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WebSocket Local Performance

Measurements come from independent local Release loopback processes, not CI.

Metric definitions and methodology.

Average process CPU uses 100% for one logical CPU and can exceed 100% with multiple threads; estimated values are labeled, and incomplete sets of three CPU samples show N/A. On this 14-logical-CPU host, machine share = process CPU% / 14; 100% of one CPU is 7.14% of the machine.

No added computation

Throughput

p99 RTT

All Measured Profiles

64 B / 1 clients / window=1

Dependency / model Round trips/s MiB/s p50 / us p95 / us p99 / us CPU / % RSS / MiB
Boost.Asio / 2 contexts / 2 threads 55,126 [55,056, 55,194] 6.73 17.71 21.50 24.17 90.4 (estimated) 8.11
Boost.Asio / 4 contexts / 4 threads 55,216 [54,747, 55,226] 6.74 17.62 21.38 24.04 90.4 (estimated) 8.19
Boost.Asio / 1 context / 1 thread 63,238 [61,013, 64,632] 7.72 15.21 22.12 24.96 83.7 (estimated) 8.14
Boost.Asio / 1 context / 2 threads 53,370 [53,069, 53,549] 6.51 18.17 23.62 26.58 119.1 (estimated) 8.09
Boost.Asio / 1 context / 4 threads 39,796 [38,699, 39,905] 4.86 24.21 30.42 40.71 179.4 (estimated) 8.19
Standalone Asio / 2 contexts / 2 threads 60,649 [60,466, 61,384] 7.40 15.75 19.96 23.25 95.4 (estimated) 8.56
Standalone Asio / 4 contexts / 4 threads 60,475 [59,801, 60,737] 7.38 15.88 20.08 23.92 94.7 (estimated) 8.62
Standalone Asio / 1 context / 1 thread 54,636 [54,173, 56,364] 6.67 19.00 22.62 26.04 81.6 (estimated) 8.50
Standalone Asio / 1 context / 2 threads 53,958 [51,610, 54,192] 6.59 18.42 24.04 28.12 122.5 (estimated) 8.56
Standalone Asio / 1 context / 4 threads 41,051 [40,568, 41,467] 5.01 23.42 28.92 35.04 170.7 (estimated) 8.62

1024 B / 1 clients / window=1

Dependency / model Round trips/s MiB/s p50 / us p95 / us p99 / us CPU / % RSS / MiB
Boost.Asio / 2 contexts / 2 threads 52,242 [52,030, 52,750] 102.04 18.17 21.42 24.79 91.7 (estimated) 8.14
Boost.Asio / 4 contexts / 4 threads 52,476 [51,990, 52,496] 102.49 18.12 21.33 24.58 91.8 (estimated) 8.19
Boost.Asio / 1 context / 1 thread 50,723 [49,368, 50,839] 99.07 18.96 22.38 25.21 82.8 (estimated) 8.12
Boost.Asio / 1 context / 2 threads 48,862 [47,850, 48,990] 95.43 19.29 24.42 28.29 117.8 (estimated) 8.12
Boost.Asio / 1 context / 4 threads 38,873 [38,628, 40,189] 75.92 24.29 30.29 39.17 173.4 (estimated) 8.20
Standalone Asio / 2 contexts / 2 threads 56,523 [56,155, 56,742] 110.40 16.38 20.29 23.42 94.0 (estimated) 8.59
Standalone Asio / 4 contexts / 4 threads 56,593 [56,030, 57,153] 110.53 16.29 20.42 23.21 94.3 (estimated) 8.69
Standalone Asio / 1 context / 1 thread 50,735 [50,001, 50,779] 99.09 18.88 22.21 25.42 83.3 (estimated) 8.55
Standalone Asio / 1 context / 2 threads 48,718 [48,413, 48,820] 95.15 19.29 24.12 27.12 119.3 (estimated) 8.58
Standalone Asio / 1 context / 4 threads 38,570 [36,598, 39,183] 75.33 24.33 30.54 41.42 163.7 (estimated) 8.64

16384 B / 1 clients / window=1

Dependency / model Round trips/s MiB/s p50 / us p95 / us p99 / us CPU / % RSS / MiB
Boost.Asio / 2 contexts / 2 threads 6,915 [6,800, 6,967] 216.10 129.29 157.58 170.96 64.4 (estimated) 8.20
Boost.Asio / 4 contexts / 4 threads 6,858 [6,828, 6,955] 214.31 130.88 160.00 174.25 64.5 (estimated) 8.30
Boost.Asio / 1 context / 1 thread 8,401 [8,146, 8,492] 262.53 103.71 129.83 140.62 56.7 (estimated) 8.19
Boost.Asio / 1 context / 2 threads 16,035 [15,934, 16,111] 501.11 52.29 59.00 64.42 147.1 (estimated) 8.20
Boost.Asio / 1 context / 4 threads 10,645 [10,644, 11,023] 332.67 80.42 102.62 134.62 217.5 (estimated) 8.36
Standalone Asio / 2 contexts / 2 threads 6,480 [6,431, 6,508] 202.51 142.29 164.21 174.62 66.4 (estimated) 8.66
Standalone Asio / 4 contexts / 4 threads 6,547 [6,308, 6,573] 204.58 141.04 163.62 170.62 66.4 (estimated) 8.70
Standalone Asio / 1 context / 1 thread 7,870 [7,804, 7,968] 245.95 113.17 134.04 157.88 56.9 (estimated) 8.64
Standalone Asio / 1 context / 2 threads 15,490 [15,064, 15,502] 484.06 53.96 62.38 73.12 147.8 (estimated) 8.64
Standalone Asio / 1 context / 4 threads 11,279 [10,720, 11,298] 352.47 76.00 92.62 125.62 214.0 (estimated) 8.81

64 B / 16 clients / window=16

Dependency / model Round trips/s MiB/s p50 / us p95 / us p99 / us CPU / % RSS / MiB
Boost.Asio / 2 contexts / 2 threads 269,499 [263,627, 274,023] 32.90 967.25 1,313.62 1,459.50 198.8 (estimated) 9.23
Boost.Asio / 4 contexts / 4 threads 296,503 [294,559, 303,759] 36.19 766.08 1,329.46 1,678.58 381.2 (estimated) 9.38
Boost.Asio / 1 context / 1 thread 160,506 [156,591, 163,807] 19.59 1,574.38 1,753.21 2,383.75 97.5 (estimated) 9.09
Boost.Asio / 1 context / 2 threads 207,659 [205,752, 208,640] 25.35 1,227.00 1,341.25 1,466.29 192.5 (estimated) 9.20
Boost.Asio / 1 context / 4 threads 217,362 [215,987, 217,802] 26.53 1,184.42 1,355.00 1,680.54 359.3 (estimated) 9.38
Standalone Asio / 2 contexts / 2 threads 282,115 [281,053, 289,321] 34.44 877.46 945.62 1,509.25 198.9 (estimated) 9.56
Standalone Asio / 4 contexts / 4 threads 325,744 [304,374, 347,721] 39.76 764.67 1,221.83 1,273.25 387.9 (estimated) 9.89
Standalone Asio / 1 context / 1 thread 156,037 [145,957, 157,850] 19.05 1,618.08 1,688.21 1,758.46 99.6 (estimated) 9.64
Standalone Asio / 1 context / 2 threads 229,468 [228,751, 231,406] 28.01 1,096.17 1,167.21 1,355.46 197.8 (estimated) 9.58
Standalone Asio / 1 context / 4 threads 256,714 [254,044, 259,312] 31.34 955.46 1,175.71 1,538.88 382.8 (estimated) 9.73

1024 B / 16 clients / window=16

Dependency / model Round trips/s MiB/s p50 / us p95 / us p99 / us CPU / % RSS / MiB
Boost.Asio / 2 contexts / 2 threads 224,761 [219,029, 226,371] 438.99 1,124.25 1,283.38 1,564.71 199.1 (estimated) 9.80
Boost.Asio / 4 contexts / 4 threads 268,996 [267,176, 273,267] 525.38 870.50 1,471.25 1,650.83 381.0 (estimated) 9.94
Boost.Asio / 1 context / 1 thread 139,579 [136,624, 140,775] 272.62 1,736.88 2,895.75 3,709.92 97.6 (estimated) 9.75
Boost.Asio / 1 context / 2 threads 175,392 [173,541, 175,970] 342.56 1,448.08 1,533.83 1,599.67 192.6 (estimated) 9.88
Boost.Asio / 1 context / 4 threads 182,672 [150,381, 183,738] 356.78 1,365.08 1,679.17 2,332.17 358.2 (estimated) 9.94
Standalone Asio / 2 contexts / 2 threads 213,574 [197,498, 214,573] 417.14 1,180.04 1,296.92 2,148.62 199.0 (estimated) 10.20
Standalone Asio / 4 contexts / 4 threads 266,522 [257,696, 266,948] 520.55 901.83 1,423.12 1,482.04 387.2 (estimated) 10.47
Standalone Asio / 1 context / 1 thread 129,795 [119,376, 130,507] 253.51 1,961.25 2,069.79 2,155.08 99.5 (estimated) 10.20
Standalone Asio / 1 context / 2 threads 179,580 [175,593, 182,302] 350.74 1,407.38 1,532.08 1,955.33 196.9 (estimated) 10.28
Standalone Asio / 1 context / 4 threads 180,164 [173,686, 188,995] 351.88 1,357.50 1,851.79 2,066.25 375.9 (estimated) 10.34

16384 B / 16 clients / window=16

Dependency / model Round trips/s MiB/s p50 / us p95 / us p99 / us CPU / % RSS / MiB
Boost.Asio / 2 contexts / 2 threads 46,070 [45,497, 46,201] 1,439.67 5,449.75 5,893.21 7,423.54 198.7 (estimated) 20.86
Boost.Asio / 4 contexts / 4 threads 63,880 [63,400, 64,917] 1,996.26 3,810.29 5,167.38 5,481.83 382.2 (estimated) 20.95
Boost.Asio / 1 context / 1 thread 23,043 [22,781, 23,102] 720.08 11,088.50 11,352.25 11,612.17 95.7 (estimated) 20.86
Boost.Asio / 1 context / 2 threads 35,519 [35,421, 35,656] 1,109.97 7,190.54 7,613.38 8,044.83 194.3 (estimated) 20.91
Boost.Asio / 1 context / 4 threads 35,898 [35,675, 36,423] 1,121.80 7,083.21 7,638.29 8,074.12 353.6 (estimated) 20.94
Standalone Asio / 2 contexts / 2 threads 42,177 [41,208, 42,974] 1,318.03 6,003.00 6,261.25 7,416.33 199.0 (estimated) 21.28
Standalone Asio / 4 contexts / 4 threads 59,183 [56,438, 60,383] 1,849.45 4,207.25 5,361.42 6,102.46 391.0 (estimated) 21.48
Standalone Asio / 1 context / 1 thread 21,613 [20,676, 21,638] 675.39 11,811.58 12,073.38 12,357.38 97.1 (estimated) 21.27
Standalone Asio / 1 context / 2 threads 35,182 [35,087, 35,212] 1,099.45 7,245.88 7,492.38 7,825.75 197.5 (estimated) 21.31
Standalone Asio / 1 context / 4 threads 38,005 [37,522, 38,123] 1,187.67 6,708.38 6,947.92 7,406.42 379.3 (estimated) 21.34

Tables show repeated-run medians; throughput brackets show min/max, not confidence intervals. Latencies are medians of per-run sampled percentiles, without pooling samples.

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