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by Jiří {x2} Činčura

Named locks (using Monitor) in .NET: Performance

26 Feb 2018 .NET, Multithreading/Parallelism/Asynchronous/Concurrency

One thing remaining from last week’s exploration of named locks is performance. My personal preference was and still is ConcurrentDictionary<TKey, TValue>, but what if the string interning is 10 times faster? That would convince me to thing about it for usage.

What to measure?

I can measure how long does it take to get a lock using one or the other method, but that might be misleading. Both methods need to keep collection of “locks” and look up the one requested. This might have a different complexity (the infamous big-O) based on number of items. Similarly, both methods are, given we’re talking about multithreaded usage here, “thread safe”, thus accessing from multiple threads might change (i.e. internal locking or thread/CPU/bucket/… affinity) the outcome. And finally, the first access might be (or not) more costly (because the item is created) compared to subsequent ones.

Although you can throw into the mix more variables, these three – number of locks, number of threads and number of lock accesses – are the ones I’ll use to get the numbers. The last two, and especially the last one, are very synthetic in my test. Because in real code other factors affect the speed (like CPU cache hits or thrashing).

I’m testing with number of locks 1, 20, 100 and 1000. No particular reason, just values that seemed interesting to me. For numbers of threads (using Tasks) I used 1-6 on Intel Core i5-7500 CPU 3.40GHz (4 logical cores and 4 physical cores). You might be wondering why I went to 6 and didn’t stop at 4 (because that’s the number of cores the CPU has). I wanted to also test the behavior when the processor is slightly oversubscribed and probably some thrashing happens. For number of lock accesses I selected 1, 10, 20, 100, 400, 1000 and 65535. The execution environment is .NET Core 2.0.5 (Framework 4.6.26020.03), 64bit RyuJIT.

To make it more digestible I’ll focus on number of locks and include the remaining variables in a single graph. The raw numbers (including allocations) and code are available at the end of this post.

The graphs show comparison where > 0% means ConcurrentDictionary<TKey, TValue> is faster. Also you can zoom in since these are vector graphics.

1 lock

Well, with one lock it’s questionable whether you need named locks, but let’s take it as an edge case and starting point.

Locks=1

For one lock the string interning is winner for small number of accesses, although it’s starting to lose its edge once number of accesses starts growing. The numbers for number of tasks are not smooth, yet one can see small trend across.

20 locks

This number of locks (together with 100) I consider as something most developers would need. Not a huge number where I would start thinking about different solution (and maybe even distributed locks).

Locks=20

The graph has similar shape as the previous one, but smoother (also the range is different). Somewhere around 20 accesses the ConcurrentDictionary<TKey, TValue> starts to clearly win. I hope for 100 locks the results will be similar, because that would validate my ConcurrentDictionary<TKey, TValue> preference. 😃

100 locks

As I said in paragraph for 20 locks, this number of locks feels like a good fit for the solution we’re talking here about.

Locks=100

For one access the drop continues, but again around 20 accesses the ConcurrentDictionary<TKey, TValue> starts to win. And the trend continues. I like that. 😃

1000 locks

Mostly to see whether there will be some drop, I tested also 1000 locks.

Locks=1000

Luckily, the results are not surprising and follow the trend started in previous instances.

Summary

I prefer clean code over some smart (ab)use and ConcurrentDictionary<TKey, TValue> fits into this box perfectly. Usually this is tied to some small (performance) tradeoffs (Ever seen heavily optimized code?). However, I’m happy to see in this case clean code and performance go hand in hand.

As a bonus ConcurrentDictionary<TKey, TValue> gives you more options – different lock types, different keys, … Looks like sometimes we can have nice things.

Implementation

Appendix

Raw numbers
Method Tasks Locks Loops Mean Error StdDev Scaled ScaledSD Gen 0 Gen 1 Gen 2 Allocated
TestDictionaryLock 1 1 1 2.384 μs 0.2829 μs 0.0160 μs 1.00 0.00 0.3166 - - 896 B
TestInternLock 1 1 1 1.834 μs 0.4310 μs 0.0244 μs 0.77 0.01 0.1163 - - 336 B
TestDictionaryLock 1 1 10 3.582 μs 0.8946 μs 0.0505 μs 1.00 0.00 0.4120 - - 896 B
TestInternLock 1 1 10 3.776 μs 0.0722 μs 0.0041 μs 1.05 0.01 0.2098 - - 336 B
TestDictionaryLock 1 1 20 5.801 μs 0.0642 μs 0.0036 μs 1.00 0.00 0.5112 - - 896 B
TestInternLock 1 1 20 5.620 μs 0.2421 μs 0.0137 μs 0.97 0.00 0.3128 - - 336 B
TestDictionaryLock 1 1 100 16.941 μs 0.3988 μs 0.0225 μs 1.00 0.00 1.3123 - - 896 B
TestInternLock 1 1 100 17.638 μs 11.0584 μs 0.6248 μs 1.04 0.03 1.1292 - - 336 B
TestDictionaryLock 1 1 400 79.894 μs 4.8768 μs 0.2755 μs 1.00 0.00 4.3945 - - 896 B
TestInternLock 1 1 400 79.017 μs 5.8409 μs 0.3300 μs 0.99 0.00 4.1504 - - 336 B
TestDictionaryLock 1 1 1000 164.545 μs 37.0714 μs 2.0946 μs 1.00 0.00 10.4980 - - 920 B
TestInternLock 1 1 1000 167.234 μs 39.4734 μs 2.2303 μs 1.02 0.02 10.2539 - - 360 B
TestDictionaryLock 1 1 65535 6,725.112 μs 800.5482 μs 45.2325 μs 1.00 0.00 664.0625 - - 920 B
TestInternLock 1 1 65535 8,319.501 μs 452.4859 μs 25.5663 μs 1.24 0.01 656.2500 - - 360 B
TestDictionaryLock 1 20 1 5.966 μs 0.1880 μs 0.0106 μs 1.00 0.00 0.9537 - - 896 B
TestInternLock 1 20 1 5.561 μs 0.1257 μs 0.0071 μs 0.93 0.00 0.3128 - - 336 B
TestDictionaryLock 1 20 10 37.583 μs 1.0196 μs 0.0576 μs 1.00 0.00 2.7466 - - 896 B
TestInternLock 1 20 10 37.302 μs 1.9679 μs 0.1112 μs 0.99 0.00 2.1362 - - 336 B
TestDictionaryLock 1 20 20 79.149 μs 3.4790 μs 0.1966 μs 1.00 0.00 4.7607 - - 896 B
TestInternLock 1 20 20 79.538 μs 9.8948 μs 0.5591 μs 1.00 0.01 4.1504 - - 336 B
TestDictionaryLock 1 20 100 231.839 μs 12.6745 μs 0.7161 μs 1.00 0.00 20.9961 - - 920 B
TestInternLock 1 20 100 275.857 μs 30.7735 μs 1.7388 μs 1.19 0.01 20.5078 - - 360 B
TestDictionaryLock 1 20 400 858.758 μs 7.0789 μs 0.4000 μs 1.00 0.00 82.0313 - - 920 B
TestInternLock 1 20 400 1,038.687 μs 53.0253 μs 2.9960 μs 1.21 0.00 80.0781 - - 360 B
TestDictionaryLock 1 20 1000 2,118.682 μs 140.2521 μs 7.9245 μs 1.00 0.00 203.1250 - - 920 B
TestInternLock 1 20 1000 2,663.460 μs 124.4367 μs 7.0309 μs 1.26 0.00 203.1250 - - 360 B
TestDictionaryLock 1 20 65535 138,224.428 μs 12,331.6683 μs 696.7621 μs 1.00 0.00 13312.5000 - - 920 B
TestInternLock 1 20 65535 167,835.182 μs 18,773.5246 μs 1,060.7390 μs 1.21 0.01 13312.5000 - - 0 B
TestDictionaryLock 1 100 1 38.555 μs 2.0618 μs 0.1165 μs 1.00 0.00 7.3853 - - 896 B
TestInternLock 1 100 1 16.545 μs 1.1577 μs 0.0654 μs 0.43 0.00 1.1292 - - 336 B
TestDictionaryLock 1 100 10 171.770 μs 17.4924 μs 0.9884 μs 1.00 0.00 17.0898 - - 920 B
TestInternLock 1 100 10 168.112 μs 17.4364 μs 0.9852 μs 0.98 0.01 10.2539 - - 360 B
TestDictionaryLock 1 100 20 246.696 μs 16.3582 μs 0.9243 μs 1.00 0.00 26.8555 - - 920 B
TestInternLock 1 100 20 263.627 μs 56.1612 μs 3.1732 μs 1.07 0.01 20.5078 - - 360 B
TestDictionaryLock 1 100 100 1,113.694 μs 91.1594 μs 5.1507 μs 1.00 0.00 107.4219 - - 920 B
TestInternLock 1 100 100 1,291.072 μs 26.6638 μs 1.5066 μs 1.16 0.00 101.5625 - - 360 B
TestDictionaryLock 1 100 400 4,264.538 μs 294.9824 μs 16.6671 μs 1.00 0.00 406.2500 - - 920 B
TestInternLock 1 100 400 5,098.486 μs 210.6562 μs 11.9025 μs 1.20 0.00 406.2500 - - 360 B
TestDictionaryLock 1 100 1000 10,659.689 μs 651.4082 μs 36.8058 μs 1.00 0.00 1015.6250 - - 920 B
TestInternLock 1 100 1000 12,669.578 μs 1,313.1982 μs 74.1981 μs 1.19 0.01 1015.6250 - - 360 B
TestDictionaryLock 1 100 65535 684,216.566 μs 42,044.1601 μs 2,375.5730 μs 1.00 0.00 66625.0000 62.5000 - 920 B
TestInternLock 1 100 65535 808,516.806 μs 187,226.6220 μs 10,578.6513 μs 1.18 0.01 66625.0000 62.5000 - 0 B
TestDictionaryLock 1 1000 1 310.825 μs 64.3900 μs 3.6382 μs 1.00 0.00 85.9375 0.4883 - 920 B
TestInternLock 1 1000 1 166.409 μs 9.4303 μs 0.5328 μs 0.54 0.01 10.2539 - - 360 B
TestDictionaryLock 1 1000 10 1,359.801 μs 136.6926 μs 7.7234 μs 1.00 0.00 173.8281 5.8594 - 920 B
TestInternLock 1 1000 10 1,345.312 μs 136.4554 μs 7.7100 μs 0.99 0.01 101.5625 - - 360 B
TestDictionaryLock 1 1000 20 2,484.658 μs 378.4025 μs 21.3804 μs 1.00 0.00 273.4375 3.9063 - 920 B
TestInternLock 1 1000 20 2,641.118 μs 89.8266 μs 5.0754 μs 1.06 0.01 203.1250 - - 360 B
TestDictionaryLock 1 1000 100 11,515.744 μs 1,109.4992 μs 62.6888 μs 1.00 0.00 1046.8750 - - 920 B
TestInternLock 1 1000 100 13,108.823 μs 2,114.1998 μs 119.4562 μs 1.14 0.01 1015.6250 - - 360 B
TestDictionaryLock 1 1000 400 43,695.877 μs 2,398.2737 μs 135.5069 μs 1.00 0.00 4125.0000 62.5000 - 920 B
TestInternLock 1 1000 400 51,592.297 μs 4,701.7114 μs 265.6554 μs 1.18 0.01 4062.5000 - - 0 B
TestDictionaryLock 1 1000 1000 107,942.228 μs 2,983.8161 μs 168.5911 μs 1.00 0.00 10250.0000 62.5000 - 920 B
TestInternLock 1 1000 1000 128,970.444 μs 10,872.5326 μs 614.3183 μs 1.19 0.00 10125.0000 - - 0 B
TestDictionaryLock 1 1000 65535 7,114,549.990 μs 126,298.5357 μs 7,136.1015 μs 1.00 0.00 666687.5000 750.0000 62.5000 920 B
TestInternLock 1 1000 65535 8,569,304.272 μs 354,731.5006 μs 20,042.9876 μs 1.20 0.00 666625.0000 812.5000 62.5000 0 B
TestDictionaryLock 2 1 1 3.328 μs 0.6476 μs 0.0366 μs 1.00 0.00 0.3548 - - 976 B
TestInternLock 2 1 1 2.369 μs 0.1754 μs 0.0099 μs 0.71 0.01 0.1526 - - 416 B
TestDictionaryLock 2 1 10 5.741 μs 0.1134 μs 0.0064 μs 1.00 0.00 0.5417 - - 976 B
TestInternLock 2 1 10 5.595 μs 0.4719 μs 0.0267 μs 0.97 0.00 0.3357 - - 416 B
TestDictionaryLock 2 1 20 8.973 μs 0.4680 μs 0.0264 μs 1.00 0.00 0.7477 - - 976 B
TestInternLock 2 1 20 10.933 μs 3.3557 μs 0.1896 μs 1.22 0.02 0.5341 - - 416 B
TestDictionaryLock 2 1 100 39.850 μs 2.6788 μs 0.1514 μs 1.00 0.00 2.3804 - - 976 B
TestInternLock 2 1 100 40.011 μs 8.7853 μs 0.4964 μs 1.00 0.01 2.1362 - - 416 B
TestDictionaryLock 2 1 400 124.503 μs 66.3677 μs 3.7499 μs 1.00 0.00 8.4229 - - 990 B
TestInternLock 2 1 400 165.331 μs 1.4007 μs 0.0791 μs 1.33 0.03 8.3008 - - 440 B
TestDictionaryLock 2 1 1000 197.343 μs 62.1484 μs 3.5115 μs 1.00 0.00 20.7520 - - 1000 B
TestInternLock 2 1 1000 260.305 μs 20.0641 μs 1.1337 μs 1.32 0.02 20.5078 - - 440 B
TestDictionaryLock 2 1 65535 12,163.300 μs 3,363.3907 μs 190.0378 μs 1.00 0.00 1328.1250 - - 1000 B
TestInternLock 2 1 65535 16,024.850 μs 1,853.4293 μs 104.7222 μs 1.32 0.02 1312.5000 - - 440 B
TestDictionaryLock 2 20 1 11.434 μs 1.7025 μs 0.0962 μs 1.00 0.00 1.1902 - - 976 B
TestInternLock 2 20 1 6.221 μs 0.5643 μs 0.0319 μs 0.54 0.00 0.5417 - - 416 B
TestDictionaryLock 2 20 10 42.193 μs 4.0355 μs 0.2280 μs 1.00 0.00 5.4321 - - 976 B
TestInternLock 2 20 10 39.023 μs 1.8920 μs 0.1069 μs 0.92 0.00 4.2114 - - 416 B
TestDictionaryLock 2 20 20 82.887 μs 2.6737 μs 0.1511 μs 1.00 0.00 8.9111 - - 976 B
TestInternLock 2 20 20 81.704 μs 1.0930 μs 0.0618 μs 0.99 0.00 8.3008 - - 416 B
TestDictionaryLock 2 20 100 280.539 μs 8.0558 μs 0.4552 μs 1.00 0.00 41.5039 - - 1000 B
TestInternLock 2 20 100 332.738 μs 31.8152 μs 1.7976 μs 1.19 0.01 41.0156 - - 440 B
TestDictionaryLock 2 20 400 1,170.990 μs 138.5276 μs 7.8271 μs 1.00 0.00 164.0625 - - 1000 B
TestInternLock 2 20 400 1,328.989 μs 173.9588 μs 9.8290 μs 1.13 0.01 164.0625 - - 440 B
TestDictionaryLock 2 20 1000 2,790.911 μs 229.8305 μs 12.9858 μs 1.00 0.00 410.1563 - - 1000 B
TestInternLock 2 20 1000 3,223.763 μs 581.2532 μs 32.8419 μs 1.16 0.01 410.1563 - - 440 B
TestDictionaryLock 2 20 65535 174,308.043 μs 25,076.7397 μs 1,416.8823 μs 1.00 0.00 26750.0000 - - 1000 B
TestInternLock 2 20 65535 206,316.910 μs 25,221.4516 μs 1,425.0588 μs 1.18 0.01 26750.0000 - - 0 B
TestDictionaryLock 2 100 1 51.381 μs 7.5886 μs 0.4288 μs 1.00 0.00 8.2397 - - 976 B
TestInternLock 2 100 1 23.607 μs 1.2819 μs 0.0724 μs 0.46 0.00 2.1667 - - 416 B
TestDictionaryLock 2 100 10 182.327 μs 46.6198 μs 2.6341 μs 1.00 0.00 27.0996 - - 1000 B
TestInternLock 2 100 10 166.095 μs 1.4523 μs 0.0821 μs 0.91 0.01 20.5078 - - 440 B
TestDictionaryLock 2 100 20 300.217 μs 24.0451 μs 1.3586 μs 1.00 0.00 50.2930 - - 1000 B
TestInternLock 2 100 20 292.599 μs 47.8656 μs 2.7045 μs 0.97 0.01 41.0156 - - 440 B
TestDictionaryLock 2 100 100 1,343.876 μs 111.9028 μs 6.3227 μs 1.00 0.00 210.9375 - - 1000 B
TestInternLock 2 100 100 1,459.805 μs 48.9921 μs 2.7681 μs 1.09 0.00 205.0781 - - 440 B
TestDictionaryLock 2 100 400 4,924.229 μs 328.8836 μs 18.5825 μs 1.00 0.00 820.3125 - - 1000 B
TestInternLock 2 100 400 5,879.851 μs 509.1625 μs 28.7686 μs 1.19 0.01 820.3125 - - 440 B
TestDictionaryLock 2 100 1000 12,511.940 μs 1,880.2046 μs 106.2350 μs 1.00 0.00 2046.8750 - - 1000 B
TestInternLock 2 100 1000 14,453.271 μs 2,812.6414 μs 158.9195 μs 1.16 0.01 2046.8750 - - 440 B
TestDictionaryLock 2 100 65535 794,836.172 μs 60,370.8319 μs 3,411.0640 μs 1.00 0.00 133937.5000 62.5000 - 1000 B
TestInternLock 2 100 65535 1,010,072.401 μs 21,662.6712 μs 1,223.9811 μs 1.27 0.00 133875.0000 62.5000 - 0 B
TestDictionaryLock 2 1000 1 406.395 μs 119.5370 μs 6.7541 μs 1.00 0.00 71.7773 - - 1000 B
TestInternLock 2 1000 1 166.391 μs 1.0933 μs 0.0618 μs 0.41 0.01 20.5078 - - 440 B
TestDictionaryLock 2 1000 10 1,675.098 μs 302.2105 μs 17.0755 μs 1.00 0.00 275.3906 5.8594 - 1000 B
TestInternLock 2 1000 10 1,499.291 μs 13.5832 μs 0.7675 μs 0.90 0.01 205.0781 - - 440 B
TestDictionaryLock 2 1000 20 2,965.299 μs 501.9848 μs 28.3631 μs 1.00 0.00 488.2813 3.9063 - 1000 B
TestInternLock 2 1000 20 2,916.796 μs 232.9405 μs 13.1616 μs 0.98 0.01 410.1563 - - 440 B
TestDictionaryLock 2 1000 100 13,152.996 μs 731.8705 μs 41.3520 μs 1.00 0.00 2125.0000 15.6250 - 1000 B
TestInternLock 2 1000 100 14,103.523 μs 202.1888 μs 11.4240 μs 1.07 0.00 2046.8750 - - 440 B
TestDictionaryLock 2 1000 400 48,244.850 μs 5,597.4994 μs 316.2691 μs 1.00 0.00 8250.0000 62.5000 - 1000 B
TestInternLock 2 1000 400 56,117.316 μs 1,265.0680 μs 71.4787 μs 1.16 0.01 8125.0000 - - 0 B
TestDictionaryLock 2 1000 1000 118,234.838 μs 11,485.4707 μs 648.9504 μs 1.00 0.00 20500.0000 62.5000 - 1000 B
TestInternLock 2 1000 1000 140,734.859 μs 10,177.7363 μs 575.0610 μs 1.19 0.01 20437.5000 - - 0 B
TestDictionaryLock 2 1000 65535 7,865,743.167 μs 699,870.5997 μs 39,543.9867 μs 1.00 0.00 1338875.0000 750.0000 62.5000 1000 B
TestInternLock 2 1000 65535 10,225,537.578 μs 2,505,605.3843 μs 141,571.3507 μs 1.30 0.02 1338125.0000 1000.0000 62.5000 0 B
TestDictionaryLock 3 1 1 3.826 μs 0.5958 μs 0.0337 μs 1.00 0.00 0.3929 - - 1056 B
TestInternLock 3 1 1 2.477 μs 0.0428 μs 0.0024 μs 0.65 0.00 0.1869 - - 496 B
TestDictionaryLock 3 1 10 10.784 μs 3.8015 μs 0.2148 μs 1.00 0.00 0.6714 - - 1056 B
TestInternLock 3 1 10 10.318 μs 5.3294 μs 0.3011 μs 0.96 0.03 0.4578 - - 496 B
TestDictionaryLock 3 1 20 16.286 μs 12.6020 μs 0.7120 μs 1.00 0.00 0.9766 - - 1056 B
TestInternLock 3 1 20 18.224 μs 1.4720 μs 0.0832 μs 1.12 0.04 0.7629 - - 496 B
TestDictionaryLock 3 1 100 58.080 μs 14.0533 μs 0.7940 μs 1.00 0.00 3.4180 - - 1057 B
TestInternLock 3 1 100 62.464 μs 16.1114 μs 0.9103 μs 1.08 0.02 3.1738 - - 496 B
TestDictionaryLock 3 1 400 171.092 μs 16.5191 μs 0.9334 μs 1.00 0.00 12.4512 - - 1080 B
TestInternLock 3 1 400 174.201 μs 1.7844 μs 0.1008 μs 1.02 0.00 12.4512 - - 520 B
TestDictionaryLock 3 1 1000 344.115 μs 14.4355 μs 0.8156 μs 1.00 0.00 30.7617 - - 1080 B
TestInternLock 3 1 1000 368.629 μs 19.1013 μs 1.0793 μs 1.07 0.00 30.7617 - - 520 B
TestDictionaryLock 3 1 65535 18,732.725 μs 2,956.7280 μs 167.0606 μs 1.00 0.00 2000.0000 - - 1080 B
TestInternLock 3 1 65535 22,073.674 μs 1,567.5754 μs 88.5709 μs 1.18 0.01 2000.0000 - - 520 B
TestDictionaryLock 3 20 1 12.343 μs 6.5384 μs 0.3694 μs 1.00 0.00 1.4343 - - 1056 B
TestInternLock 3 20 1 7.833 μs 2.1400 μs 0.1209 μs 0.64 0.02 0.7629 - - 496 B
TestDictionaryLock 3 20 10 42.105 μs 4.6051 μs 0.2602 μs 1.00 0.00 6.9580 - - 1056 B
TestInternLock 3 20 10 42.283 μs 7.2893 μs 0.4119 μs 1.00 0.01 6.2866 - - 496 B
TestDictionaryLock 3 20 20 85.754 μs 12.4378 μs 0.7028 μs 1.00 0.00 13.6719 - - 1056 B
TestInternLock 3 20 20 83.709 μs 3.5192 μs 0.1988 μs 0.98 0.01 12.4512 - - 496 B
TestDictionaryLock 3 20 100 319.979 μs 73.7067 μs 4.1646 μs 1.00 0.00 62.5000 - - 1079 B
TestInternLock 3 20 100 351.097 μs 18.0343 μs 1.0190 μs 1.10 0.01 61.5234 - - 520 B
TestDictionaryLock 3 20 400 1,246.605 μs 83.7829 μs 4.7339 μs 1.00 0.00 246.0938 - - 1079 B
TestInternLock 3 20 400 1,354.222 μs 227.9077 μs 12.8772 μs 1.09 0.01 246.0938 - - 520 B
TestDictionaryLock 3 20 1000 3,163.837 μs 307.6502 μs 17.3828 μs 1.00 0.00 613.2813 - - 1080 B
TestInternLock 3 20 1000 3,432.767 μs 540.7030 μs 30.5507 μs 1.09 0.01 613.2813 - - 520 B
TestDictionaryLock 3 20 65535 203,547.288 μs 46,269.8623 μs 2,614.3330 μs 1.00 0.00 40187.5000 - - 1080 B
TestInternLock 3 20 65535 216,462.514 μs 27,927.2543 μs 1,577.9417 μs 1.06 0.01 40125.0000 - - 520 B
TestDictionaryLock 3 100 1 79.574 μs 34.7981 μs 1.9662 μs 1.00 0.00 9.8877 - - 1057 B
TestInternLock 3 100 1 22.301 μs 5.8857 μs 0.3326 μs 0.28 0.01 3.2349 - - 496 B
TestDictionaryLock 3 100 10 221.724 μs 32.8314 μs 1.8550 μs 1.00 0.00 41.2598 - - 1079 B
TestInternLock 3 100 10 171.009 μs 7.6900 μs 0.4345 μs 0.77 0.01 30.7617 - - 518 B
TestDictionaryLock 3 100 20 329.846 μs 35.2816 μs 1.9935 μs 1.00 0.00 68.3594 - - 1080 B
TestInternLock 3 100 20 320.620 μs 20.7327 μs 1.1714 μs 0.97 0.01 61.5234 - - 520 B
TestDictionaryLock 3 100 100 1,435.405 μs 359.0726 μs 20.2883 μs 1.00 0.00 312.5000 - - 1080 B
TestInternLock 3 100 100 1,614.061 μs 158.8816 μs 8.9771 μs 1.12 0.01 306.6406 - - 520 B
TestDictionaryLock 3 100 400 5,631.286 μs 601.9850 μs 34.0133 μs 1.00 0.00 1234.3750 - - 1080 B
TestInternLock 3 100 400 6,330.513 μs 752.4854 μs 42.5168 μs 1.12 0.01 1226.5625 - - 520 B
TestDictionaryLock 3 100 1000 13,493.835 μs 250.1702 μs 14.1351 μs 1.00 0.00 3062.5000 - - 1080 B
TestInternLock 3 100 1000 15,472.699 μs 598.5754 μs 33.8206 μs 1.15 0.00 3062.5000 - - 520 B
TestDictionaryLock 3 100 65535 880,641.934 μs 103,953.0698 μs 5,873.5412 μs 1.00 0.00 201000.0000 62.5000 - 1080 B
TestInternLock 3 100 65535 1,017,444.678 μs 125,053.0734 μs 7,065.7305 μs 1.16 0.01 200812.5000 62.5000 - 520 B
TestDictionaryLock 3 1000 1 668.525 μs 122.8889 μs 6.9435 μs 1.00 0.00 94.7266 25.3906 - 1080 B
TestInternLock 3 1000 1 169.507 μs 15.4166 μs 0.8711 μs 0.25 0.00 30.7617 - - 519 B
TestDictionaryLock 3 1000 10 1,701.305 μs 161.1212 μs 9.1036 μs 1.00 0.00 359.3750 - - 1080 B
TestInternLock 3 1000 10 1,528.503 μs 48.0116 μs 2.7127 μs 0.90 0.00 306.6406 - - 520 B
TestDictionaryLock 3 1000 20 3,260.236 μs 326.0402 μs 18.4219 μs 1.00 0.00 687.5000 23.4375 - 1080 B
TestInternLock 3 1000 20 2,956.878 μs 309.6972 μs 17.4985 μs 0.91 0.01 613.2813 - - 520 B
TestDictionaryLock 3 1000 100 13,464.597 μs 2,806.1687 μs 158.5537 μs 1.00 0.00 3109.3750 46.8750 - 1080 B
TestInternLock 3 1000 100 14,429.220 μs 813.1527 μs 45.9446 μs 1.07 0.01 3062.5000 - - 520 B
TestDictionaryLock 3 1000 400 51,378.370 μs 7,584.3233 μs 428.5283 μs 1.00 0.00 12312.5000 - - 1080 B
TestInternLock 3 1000 400 59,284.773 μs 5,706.0087 μs 322.4001 μs 1.15 0.01 12250.0000 - - 520 B
TestDictionaryLock 3 1000 1000 122,127.455 μs 7,241.1061 μs 409.1359 μs 1.00 0.00 30750.0000 62.5000 - 1080 B
TestInternLock 3 1000 1000 145,677.352 μs 6,874.9808 μs 388.4492 μs 1.19 0.00 30625.0000 - - 520 B
TestDictionaryLock 3 1000 65535 7,843,702.730 μs 103,855.9596 μs 5,868.0543 μs 1.00 0.00 2010250.0000 750.0000 62.5000 1080 B
TestInternLock 3 1000 65535 10,940,394.713 μs 885,134.1962 μs 50,011.7235 μs 1.39 0.01 2008750.0000 1062.5000 62.5000 520 B
TestDictionaryLock 4 1 1 3.828 μs 0.2287 μs 0.0129 μs 1.00 0.00 0.4272 - - 1136 B
TestInternLock 4 1 1 2.804 μs 0.6758 μs 0.0382 μs 0.73 0.01 0.2251 - - 576 B
TestDictionaryLock 4 1 10 14.186 μs 4.6463 μs 0.2625 μs 1.00 0.00 0.7935 - - 1136 B
TestInternLock 4 1 10 15.899 μs 15.2589 μs 0.8622 μs 1.12 0.05 0.5951 - - 576 B
TestDictionaryLock 4 1 20 18.533 μs 13.6733 μs 0.7726 μs 1.00 0.00 1.1902 - - 1136 B
TestInternLock 4 1 20 20.547 μs 0.9115 μs 0.0515 μs 1.11 0.04 1.0071 - - 576 B
TestDictionaryLock 4 1 100 74.334 μs 10.6750 μs 0.6032 μs 1.00 0.00 4.3945 - - 1138 B
TestInternLock 4 1 100 70.128 μs 5.0314 μs 0.2843 μs 0.94 0.01 4.2725 - - 577 B
TestDictionaryLock 4 1 400 240.260 μs 49.8561 μs 2.8170 μs 1.00 0.00 16.6016 - - 1152 B
TestInternLock 4 1 400 252.414 μs 20.7107 μs 1.1702 μs 1.05 0.01 16.1133 - - 593 B
TestDictionaryLock 4 1 1000 516.365 μs 105.7152 μs 5.9731 μs 1.00 0.00 41.0156 - - 1160 B
TestInternLock 4 1 1000 587.819 μs 79.2338 μs 4.4769 μs 1.14 0.01 41.0156 - - 599 B
TestDictionaryLock 4 1 65535 25,496.724 μs 3,341.2103 μs 188.7846 μs 1.00 0.00 2656.2500 - - 1160 B
TestInternLock 4 1 65535 29,043.761 μs 3,888.4696 μs 219.7057 μs 1.14 0.01 2687.5000 - - 600 B
TestDictionaryLock 4 20 1 19.139 μs 6.6812 μs 0.3775 μs 1.00 0.00 2.2583 - - 1136 B
TestInternLock 4 20 1 10.693 μs 2.7275 μs 0.1541 μs 0.56 0.01 1.0071 - - 576 B
TestDictionaryLock 4 20 10 56.642 μs 14.0270 μs 0.7926 μs 1.00 0.00 9.5215 - - 1136 B
TestInternLock 4 20 10 54.711 μs 16.9146 μs 0.9557 μs 0.97 0.02 8.3618 - - 576 B
TestDictionaryLock 4 20 20 94.859 μs 33.3386 μs 1.8837 μs 1.00 0.00 17.8223 - - 1136 B
TestInternLock 4 20 20 95.662 μs 6.1981 μs 0.3502 μs 1.01 0.02 16.4795 - - 576 B
TestDictionaryLock 4 20 100 350.521 μs 47.3034 μs 2.6727 μs 1.00 0.00 82.5195 - - 1140 B
TestInternLock 4 20 100 392.427 μs 89.5791 μs 5.0614 μs 1.12 0.01 82.0313 - - 579 B
TestDictionaryLock 4 20 400 1,409.074 μs 179.3701 μs 10.1347 μs 1.00 0.00 328.1250 - - 1142 B
TestInternLock 4 20 400 1,596.599 μs 497.1967 μs 28.0925 μs 1.13 0.02 328.1250 - - 583 B
TestDictionaryLock 4 20 1000 3,423.306 μs 292.9852 μs 16.5542 μs 1.00 0.00 820.3125 - - 1148 B
TestInternLock 4 20 1000 3,916.911 μs 370.7015 μs 20.9453 μs 1.14 0.01 820.3125 - - 589 B
TestDictionaryLock 4 20 65535 238,759.656 μs 28,768.3420 μs 1,625.4647 μs 1.00 0.00 53562.5000 - - 1160 B
TestInternLock 4 20 65535 240,173.044 μs 36,465.5474 μs 2,060.3711 μs 1.01 0.01 53625.0000 - - 600 B
TestDictionaryLock 4 100 1 78.276 μs 22.6552 μs 1.2801 μs 1.00 0.00 10.6201 - - 1136 B
TestInternLock 4 100 1 32.181 μs 3.6547 μs 0.2065 μs 0.41 0.01 4.2725 - - 576 B
TestDictionaryLock 4 100 10 225.257 μs 191.3408 μs 10.8111 μs 1.00 0.00 47.3633 - - 1138 B
TestInternLock 4 100 10 200.607 μs 45.9628 μs 2.5970 μs 0.89 0.04 41.0156 - - 579 B
TestDictionaryLock 4 100 20 369.377 μs 60.6506 μs 3.4269 μs 1.00 0.00 87.8906 - - 1139 B
TestInternLock 4 100 20 381.064 μs 37.7179 μs 2.1311 μs 1.03 0.01 82.0313 - - 579 B
TestDictionaryLock 4 100 100 1,626.447 μs 270.8847 μs 15.3055 μs 1.00 0.00 416.0156 - - 1143 B
TestInternLock 4 100 100 1,825.194 μs 164.8632 μs 9.3151 μs 1.12 0.01 410.1563 - - 584 B
TestDictionaryLock 4 100 400 6,423.642 μs 1,366.3611 μs 77.2019 μs 1.00 0.00 1640.6250 - - 1155 B
TestInternLock 4 100 400 7,195.038 μs 197.2961 μs 11.1476 μs 1.12 0.01 1632.8125 - - 594 B
TestDictionaryLock 4 100 1000 15,569.421 μs 1,998.4125 μs 112.9140 μs 1.00 0.00 4093.7500 - - 1160 B
TestInternLock 4 100 1000 17,788.066 μs 4,271.0214 μs 241.3206 μs 1.14 0.01 4062.5000 - - 600 B
TestDictionaryLock 4 100 65535 941,035.109 μs 259,060.1250 μs 14,637.3775 μs 1.00 0.00 268000.0000 62.5000 - 1160 B
TestInternLock 4 100 65535 1,152,240.628 μs 117,944.3686 μs 6,664.0755 μs 1.22 0.02 268062.5000 62.5000 - 600 B
TestDictionaryLock 4 1000 1 493.545 μs 102.6206 μs 5.7983 μs 1.00 0.00 92.7734 0.9766 - 1138 B
TestInternLock 4 1000 1 193.597 μs 16.8056 μs 0.9495 μs 0.39 0.00 41.0156 - - 579 B
TestDictionaryLock 4 1000 10 2,307.665 μs 892.9196 μs 50.4516 μs 1.00 0.00 484.3750 7.8125 - 1159 B
TestInternLock 4 1000 10 1,728.215 μs 401.3004 μs 22.6742 μs 0.75 0.02 408.2031 - - 592 B
TestDictionaryLock 4 1000 20 3,404.428 μs 291.4690 μs 16.4685 μs 1.00 0.00 898.4375 3.9063 - 1155 B
TestInternLock 4 1000 20 3,333.666 μs 120.5743 μs 6.8127 μs 0.98 0.00 816.4063 - - 597 B
TestDictionaryLock 4 1000 100 14,845.883 μs 3,171.4425 μs 179.1924 μs 1.00 0.00 4156.2500 15.6250 - 1160 B
TestInternLock 4 1000 100 16,297.478 μs 6,836.3399 μs 386.2659 μs 1.10 0.02 4093.7500 - - 600 B
TestDictionaryLock 4 1000 400 54,324.642 μs 8,321.1914 μs 470.1627 μs 1.00 0.00 16437.5000 62.5000 - 1160 B
TestInternLock 4 1000 400 65,581.893 μs 4,781.0757 μs 270.1396 μs 1.21 0.01 16312.5000 - - 600 B
TestDictionaryLock 4 1000 1000 133,144.467 μs 12,437.8217 μs 702.7600 μs 1.00 0.00 40937.5000 - - 1160 B
TestInternLock 4 1000 1000 169,070.284 μs 17,012.3254 μs 961.2279 μs 1.27 0.01 40875.0000 - - 600 B
TestDictionaryLock 4 1000 65535 8,350,871.267 μs 324,082.5072 μs 18,311.2626 μs 1.00 0.00 2680562.5000 812.5000 62.5000 1160 B
TestInternLock 4 1000 65535 11,327,458.539 μs 647,684.4732 μs 36,595.3738 μs 1.36 0.00 2681187.5000 1125.0000 62.5000 600 B
TestDictionaryLock 5 1 1 4.233 μs 0.2739 μs 0.0155 μs 1.00 0.00 0.4654 - - 1216 B
TestInternLock 5 1 1 3.201 μs 0.7275 μs 0.0411 μs 0.76 0.01 0.2594 - - 656 B
TestDictionaryLock 5 1 10 16.866 μs 3.7944 μs 0.2144 μs 1.00 0.00 0.9155 - - 1216 B
TestInternLock 5 1 10 17.398 μs 4.8043 μs 0.2715 μs 1.03 0.02 0.7019 - - 656 B
TestDictionaryLock 5 1 20 22.518 μs 0.8401 μs 0.0475 μs 1.00 0.00 1.4343 - - 1216 B
TestInternLock 5 1 20 24.251 μs 1.9021 μs 0.1075 μs 1.08 0.00 1.2207 - - 656 B
TestDictionaryLock 5 1 100 89.886 μs 23.4373 μs 1.3242 μs 1.00 0.00 5.4932 - - 1217 B
TestInternLock 5 1 100 89.790 μs 7.2754 μs 0.4111 μs 1.00 0.01 5.2490 - - 657 B
TestDictionaryLock 5 1 400 304.823 μs 300.5425 μs 16.9812 μs 1.00 0.00 20.5078 - - 1237 B
TestInternLock 5 1 400 303.577 μs 22.2818 μs 1.2590 μs 1.00 0.04 20.5078 - - 676 B
TestDictionaryLock 5 1 1000 669.440 μs 49.3563 μs 2.7887 μs 1.00 0.00 50.7813 - - 1240 B
TestInternLock 5 1 1000 643.279 μs 91.3993 μs 5.1642 μs 0.96 0.01 50.7813 - - 680 B
TestDictionaryLock 5 1 65535 31,999.028 μs 3,708.5070 μs 209.5375 μs 1.00 0.00 3312.5000 - - 1240 B
TestInternLock 5 1 65535 36,797.121 μs 2,099.8048 μs 118.6429 μs 1.15 0.01 3312.5000 - - 680 B
TestDictionaryLock 5 20 1 23.291 μs 3.2907 μs 0.1859 μs 1.00 0.00 2.4719 - - 1216 B
TestInternLock 5 20 1 16.094 μs 3.1410 μs 0.1775 μs 0.69 0.01 1.2207 - - 656 B
TestDictionaryLock 5 20 10 70.509 μs 10.8240 μs 0.6116 μs 1.00 0.00 11.1084 - - 1216 B
TestInternLock 5 20 10 73.535 μs 12.6841 μs 0.7167 μs 1.04 0.01 10.3760 - - 656 B
TestDictionaryLock 5 20 20 142.549 μs 13.9661 μs 0.7891 μs 1.00 0.00 21.2402 - - 1216 B
TestInternLock 5 20 20 155.556 μs 40.9999 μs 2.3166 μs 1.09 0.01 20.5078 - - 656 B
TestDictionaryLock 5 20 100 558.397 μs 13.5563 μs 0.7660 μs 1.00 0.00 103.5156 - - 1240 B
TestInternLock 5 20 100 637.663 μs 93.2450 μs 5.2685 μs 1.14 0.01 102.5391 - - 680 B
TestDictionaryLock 5 20 400 2,082.236 μs 75.7745 μs 4.2814 μs 1.00 0.00 410.1563 - - 1240 B
TestInternLock 5 20 400 2,496.689 μs 162.4970 μs 9.1814 μs 1.20 0.00 410.1563 - - 680 B
TestDictionaryLock 5 20 1000 5,426.040 μs 1,087.1525 μs 61.4261 μs 1.00 0.00 1023.4375 - - 1240 B
TestInternLock 5 20 1000 6,079.474 μs 1,538.7171 μs 86.9404 μs 1.12 0.02 1023.4375 - - 680 B
TestDictionaryLock 5 20 65535 320,909.368 μs 65,781.0263 μs 3,716.7500 μs 1.00 0.00 67000.0000 - - 1240 B
TestInternLock 5 20 65535 331,542.014 μs 142,861.3624 μs 8,071.9319 μs 1.03 0.02 67000.0000 - - 680 B
TestDictionaryLock 5 100 1 98.746 μs 70.8854 μs 4.0052 μs 1.00 0.00 12.2070 - - 1216 B
TestInternLock 5 100 1 41.880 μs 5.3844 μs 0.3042 μs 0.42 0.01 5.3101 - - 656 B
TestDictionaryLock 5 100 10 352.502 μs 56.1675 μs 3.1736 μs 1.00 0.00 58.1055 - - 1240 B
TestInternLock 5 100 10 325.315 μs 33.5247 μs 1.8942 μs 0.92 0.01 51.2695 - - 680 B
TestDictionaryLock 5 100 20 539.676 μs 60.5639 μs 3.4220 μs 1.00 0.00 108.3984 - - 1240 B
TestInternLock 5 100 20 594.649 μs 40.6443 μs 2.2965 μs 1.10 0.01 102.5391 - - 680 B
TestDictionaryLock 5 100 100 2,515.444 μs 272.4783 μs 15.3955 μs 1.00 0.00 515.6250 - - 1240 B
TestInternLock 5 100 100 2,898.137 μs 267.7420 μs 15.1279 μs 1.15 0.01 511.7188 - - 680 B
TestDictionaryLock 5 100 400 9,694.180 μs 2,678.4849 μs 151.3394 μs 1.00 0.00 2046.8750 - - 1240 B
TestInternLock 5 100 400 11,141.727 μs 6,750.7838 μs 381.4318 μs 1.15 0.04 2046.8750 - - 680 B
TestDictionaryLock 5 100 1000 23,627.873 μs 6,536.9976 μs 369.3525 μs 1.00 0.00 5125.0000 - - 1240 B
TestInternLock 5 100 1000 29,150.838 μs 10,015.9035 μs 565.9171 μs 1.23 0.03 5093.7500 - - 680 B
TestDictionaryLock 5 100 65535 1,298,411.959 μs 231,146.3480 μs 13,060.1973 μs 1.00 0.00 335062.5000 125.0000 - 1240 B
TestInternLock 5 100 65535 1,549,927.508 μs 350,124.5858 μs 19,782.6884 μs 1.19 0.02 334875.0000 125.0000 - 680 B
TestDictionaryLock 5 1000 1 696.251 μs 158.2827 μs 8.9433 μs 1.00 0.00 104.4922 30.2734 - 1240 B
TestInternLock 5 1000 1 321.933 μs 14.9073 μs 0.8423 μs 0.46 0.00 51.2695 - - 680 B
TestDictionaryLock 5 1000 10 2,979.770 μs 454.0742 μs 25.6560 μs 1.00 0.00 582.0313 11.7188 - 1240 B
TestInternLock 5 1000 10 2,788.646 μs 106.2873 μs 6.0054 μs 0.94 0.01 511.7188 - - 680 B
TestDictionaryLock 5 1000 20 5,403.515 μs 1,023.9239 μs 57.8536 μs 1.00 0.00 1085.9375 46.8750 - 1240 B
TestInternLock 5 1000 20 5,352.598 μs 1,735.9647 μs 98.0852 μs 0.99 0.02 1023.4375 - - 680 B
TestDictionaryLock 5 1000 100 24,056.787 μs 8,717.5466 μs 492.5575 μs 1.00 0.00 5187.5000 31.2500 - 1240 B
TestInternLock 5 1000 100 27,027.223 μs 5,926.2747 μs 334.8455 μs 1.12 0.02 5093.7500 - - 680 B
TestDictionaryLock 5 1000 400 84,310.525 μs 21,996.9847 μs 1,242.8704 μs 1.00 0.00 20437.5000 - - 1240 B
TestInternLock 5 1000 400 99,007.300 μs 55,677.1602 μs 3,145.8628 μs 1.17 0.03 20437.5000 - - 680 B
TestDictionaryLock 5 1000 1000 186,661.754 μs 21,102.7515 μs 1,192.3446 μs 1.00 0.00 51187.5000 62.5000 - 1240 B
TestInternLock 5 1000 1000 242,331.021 μs 137,141.8155 μs 7,748.7669 μs 1.30 0.03 51125.0000 - - 680 B
TestDictionaryLock 5 1000 65535 11,297,539.125 μs 1,364,219.0098 μs 77,080.9039 μs 1.00 0.00 3350312.5000 1125.0000 62.5000 1240 B
TestInternLock 5 1000 65535 16,520,813.417 μs 2,434,316.4983 μs 137,543.3964 μs 1.46 0.01 3351312.5000 1625.0000 125.0000 680 B
TestDictionaryLock 6 1 1 4.670 μs 1.3697 μs 0.0774 μs 1.00 0.00 0.4959 - - 1296 B
TestInternLock 6 1 1 3.722 μs 0.1192 μs 0.0067 μs 0.80 0.01 0.2899 - - 736 B
TestDictionaryLock 6 1 10 18.947 μs 1.3430 μs 0.0759 μs 1.00 0.00 1.0376 - - 1296 B
TestInternLock 6 1 10 15.072 μs 8.5958 μs 0.4857 μs 0.80 0.02 0.8240 - - 736 B
TestDictionaryLock 6 1 20 27.310 μs 7.0977 μs 0.4010 μs 1.00 0.00 1.6785 - - 1296 B
TestInternLock 6 1 20 28.384 μs 2.2066 μs 0.1247 μs 1.04 0.01 1.4648 - - 736 B
TestDictionaryLock 6 1 100 108.401 μs 16.3176 μs 0.9220 μs 1.00 0.00 6.5918 - - 1297 B
TestInternLock 6 1 100 116.215 μs 9.8740 μs 0.5579 μs 1.07 0.01 6.3477 - - 737 B
TestDictionaryLock 6 1 400 345.170 μs 167.8097 μs 9.4816 μs 1.00 0.00 24.9023 - - 1316 B
TestInternLock 6 1 400 348.342 μs 125.8042 μs 7.1082 μs 1.01 0.03 24.4141 - - 752 B
TestDictionaryLock 6 1 1000 823.853 μs 253.9052 μs 14.3461 μs 1.00 0.00 61.5234 - - 1320 B
TestInternLock 6 1 1000 780.323 μs 85.0360 μs 4.8047 μs 0.95 0.01 61.5234 - - 760 B
TestDictionaryLock 6 1 65535 38,816.688 μs 1,618.6084 μs 91.4544 μs 1.00 0.00 4000.0000 - - 1320 B
TestInternLock 6 1 65535 46,202.305 μs 8,154.2937 μs 460.7327 μs 1.19 0.01 4000.0000 - - 760 B
TestDictionaryLock 6 20 1 18.062 μs 13.5887 μs 0.7678 μs 1.00 0.00 2.1362 - - 1296 B
TestInternLock 6 20 1 16.542 μs 3.1981 μs 0.1807 μs 0.92 0.03 1.4648 - - 736 B
TestDictionaryLock 6 20 10 72.308 μs 7.7620 μs 0.4386 μs 1.00 0.00 13.1836 - - 1296 B
TestInternLock 6 20 10 85.129 μs 45.8313 μs 2.5896 μs 1.18 0.03 12.4512 - - 736 B
TestDictionaryLock 6 20 20 159.646 μs 24.8348 μs 1.4032 μs 1.00 0.00 25.8789 - - 1296 B
TestInternLock 6 20 20 163.904 μs 36.4644 μs 2.0603 μs 1.03 0.01 24.6582 - - 737 B
TestDictionaryLock 6 20 100 594.008 μs 67.4482 μs 3.8110 μs 1.00 0.00 123.0469 - - 1319 B
TestInternLock 6 20 100 702.172 μs 222.1953 μs 12.5544 μs 1.18 0.02 123.0469 - - 759 B
TestDictionaryLock 6 20 400 2,380.834 μs 263.4463 μs 14.8852 μs 1.00 0.00 492.1875 - - 1320 B
TestInternLock 6 20 400 2,661.568 μs 104.6614 μs 5.9136 μs 1.12 0.01 492.1875 - - 760 B
TestDictionaryLock 6 20 1000 6,167.612 μs 901.3007 μs 50.9252 μs 1.00 0.00 1226.5625 - - 1320 B
TestInternLock 6 20 1000 6,751.208 μs 205.2103 μs 11.5948 μs 1.09 0.01 1226.5625 - - 760 B
TestDictionaryLock 6 20 65535 421,834.107 μs 108,650.7437 μs 6,138.9685 μs 1.00 0.00 80375.0000 - - 1320 B
TestInternLock 6 20 65535 448,193.160 μs 88,157.2395 μs 4,981.0475 μs 1.06 0.02 80375.0000 - - 760 B
TestDictionaryLock 6 100 1 80.081 μs 25.9843 μs 1.4682 μs 1.00 0.00 12.6953 - - 1296 B
TestInternLock 6 100 1 52.145 μs 2.9474 μs 0.1665 μs 0.65 0.01 6.3477 - - 736 B
TestDictionaryLock 6 100 10 355.199 μs 66.5682 μs 3.7612 μs 1.00 0.00 65.9180 - - 1318 B
TestInternLock 6 100 10 345.120 μs 48.7614 μs 2.7551 μs 0.97 0.01 61.5234 - - 758 B
TestDictionaryLock 6 100 20 598.283 μs 272.1788 μs 15.3786 μs 1.00 0.00 128.9063 - - 1319 B
TestInternLock 6 100 20 638.452 μs 47.5469 μs 2.6865 μs 1.07 0.02 123.0469 - - 759 B
TestDictionaryLock 6 100 100 2,801.957 μs 825.7585 μs 46.6569 μs 1.00 0.00 621.0938 - - 1320 B
TestInternLock 6 100 100 3,114.667 μs 353.3775 μs 19.9665 μs 1.11 0.02 613.2813 - - 760 B
TestDictionaryLock 6 100 400 10,949.222 μs 2,327.4351 μs 131.5044 μs 1.00 0.00 2453.1250 - - 1320 B
TestInternLock 6 100 400 12,834.949 μs 521.9017 μs 29.4884 μs 1.17 0.01 2453.1250 - - 760 B
TestDictionaryLock 6 100 1000 26,909.880 μs 1,679.3608 μs 94.8870 μs 1.00 0.00 6125.0000 - - 1320 B
TestInternLock 6 100 1000 31,234.511 μs 521.7034 μs 29.4772 μs 1.16 0.00 6125.0000 - - 760 B
TestDictionaryLock 6 100 65535 1,810,533.675 μs 308,176.5546 μs 17,412.5468 μs 1.00 0.00 401937.5000 125.0000 - 1320 B
TestInternLock 6 100 65535 2,145,345.421 μs 142,627.2150 μs 8,058.7021 μs 1.18 0.01 401875.0000 187.5000 - 760 B
TestDictionaryLock 6 1000 1 783.422 μs 629.9049 μs 35.5908 μs 1.00 0.00 139.6484 2.9297 - 1318 B
TestInternLock 6 1000 1 328.274 μs 12.4438 μs 0.7031 μs 0.42 0.02 61.5234 - - 760 B
TestDictionaryLock 6 1000 10 3,140.713 μs 865.9537 μs 48.9280 μs 1.00 0.00 691.4063 7.8125 - 1320 B
TestInternLock 6 1000 10 2,924.569 μs 118.6272 μs 6.7027 μs 0.93 0.01 613.2813 - - 760 B
TestDictionaryLock 6 1000 20 5,671.544 μs 572.7923 μs 32.3638 μs 1.00 0.00 1281.2500 132.8125 - 1320 B
TestInternLock 6 1000 20 5,830.652 μs 287.4582 μs 16.2419 μs 1.03 0.01 1226.5625 - - 760 B
TestDictionaryLock 6 1000 100 25,576.689 μs 2,122.6916 μs 119.9360 μs 1.00 0.00 6187.5000 31.2500 - 1320 B
TestInternLock 6 1000 100 29,063.399 μs 2,242.1391 μs 126.6850 μs 1.14 0.01 6125.0000 - - 760 B
TestDictionaryLock 6 1000 400 99,306.942 μs 15,567.7699 μs 879.6079 μs 1.00 0.00 24562.5000 62.5000 - 1320 B
TestInternLock 6 1000 400 119,775.126 μs 16,245.8728 μs 917.9219 μs 1.21 0.01 24500.0000 - - 760 B
TestDictionaryLock 6 1000 1000 246,879.992 μs 41,931.4072 μs 2,369.2023 μs 1.00 0.00 61375.0000 62.5000 - 1320 B
TestInternLock 6 1000 1000 317,117.936 μs 23,737.4305 μs 1,341.2088 μs 1.28 0.01 61312.5000 - - 760 B
TestDictionaryLock 6 1000 65535 13,572,561.658 μs 1,295,093.1719 μs 73,175.1659 μs 1.00 0.00 4020187.5000 1312.5000 125.0000 1320 B
TestInternLock 6 1000 65535 19,568,632.313 μs 2,846,129.3880 μs 160,811.5884 μs 1.44 0.01 4021187.5000 1937.5000 187.5000 760 B
Code
public class TestBench
{
	[Params(1, 2, 3, 4, 5, 6)]
	public int Tasks { get; set; }

	[Params(1, 20, 100, 1000)]
	public int Locks { get; set; }

	[Params(1, 10, 20, 100, 400, 1000, ushort.MaxValue)]
	public int Loops { get; set; }

	[Benchmark(Baseline = true)]
	public void TestDictionaryLock()
	{
		var tester = new DictionaryLock();
		var tasks = new Task[Tasks];
		for (var i = 0; i < Tasks; i++)
		{
			tasks[i] = Task.Run(() => TestImpl(tester));
		}
		Task.WaitAll(tasks);
	}

	[Benchmark]
	public void TestInternLock()
	{
		var tester = new InternLock();
		var tasks = new Task[Tasks];
		for (var i = 0; i < Tasks; i++)
		{
			tasks[i] = Task.Run(() => TestImpl(tester));
		}
		Task.WaitAll(tasks);
	}

	void TestImpl(ILockTester tester)
	{
		var cnt = 0;
		for (var loop = 0; loop < Loops; loop++)
		{
			for (var @lock = 0; @lock < Locks; @lock++)
			{
				cnt += tester.DoSomething(@lock.ToString());
			}
		}
	}
}

interface ILockTester
{
	int DoSomething(string name);
}

class DictionaryLock : ILockTester
{
	ConcurrentDictionary<string, object> _locks;

	public DictionaryLock()
	{
		_locks = new ConcurrentDictionary<string, object>();
	}

	public int DoSomething(string name)
	{
		var locker = _locks.GetOrAdd(name, _ => new object());
		lock (locker)
		{
			return 1;
		}
	}
}

class InternLock : ILockTester
{
	public int DoSomething(string name)
	{
		var locker = string.Intern(name);
		lock (locker)
		{
			return 1;
		}
	}
}