HTTP server & framework benchmarks

kemal benchmark results

kemal 1.14 is a crystal web framework. At concurrency 64 it serves 143 488 requests per second with a P50 latency of 0.14 ms, ranking 97 of 383 overall and 7 of 12 among crystal frameworks.

Language: crystal 1.21
Framework version: 1.14
Website: https://kemalcr.com
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Throughput, latency & reliability

All measured metrics for kemal 1.14, by concurrency level.
Metric	Concurrency 64	Concurrency 256	Concurrency 512
Requests / second	143 488	147 354	134 144
P50 latency	0.14 ms	0.45 ms	1.21 ms
P75 latency	0.26 ms	1.39 ms	4.79 ms
P90 latency	0.53 ms	5.28 ms	11.34 ms
P99 latency	7.23 ms	16.33 ms	26.55 ms
P99.999 latency	24.01 ms	34.79 ms	53.77 ms
Average latency	0.45 ms	1.74 ms	3.82 ms
Minimum latency	0.02 ms	0.02 ms	0.03 ms
Standard deviation	1.34 ms	3.33 ms	5.79 ms
Total requests	2 152 440	2 210 585	2 012 655
Bytes received	255.22 MB	262.09 MB	238.61 MB
HTTP errors	0	0	0
Request timeouts	0	0	0
Socket connection errors	0	0	0
Socket read errors	0	0	0
Socket write errors	0	0	0

Position in this benchmark

Position of kemal on requests per second.
Concurrency	Overall	Among crystal frameworks
64	97 of 383	7 of 12
256	84 of 383	7 of 12
512	102 of 383	7 of 12

Badge for your README

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Explore crystal frameworks

Fastest crystal frameworks at concurrency 64.
#	Framework	Requests / second	P50 latency	P99 latency
1	toro 0.5	163 514	0.14 ms	6.72 ms
2	spider-gazelle 8.2	162 561	0.14 ms	6.47 ms
3	router.cr 0.2	161 913	0.14 ms	6.80 ms
4	runcobo 2	157 140	0.14 ms	6.49 ms
5	grip 5	149 928	0.14 ms	7.48 ms
6	athena-routing 0.2	146 161	0.14 ms	7.37 ms
8	amber 1.5	132 163	0.14 ms	6.41 ms
9	orion 3	124 845	0.14 ms	6.28 ms
10	marten 0.7	83 529	0.21 ms	8.31 ms
11	athena 0.21	74 187	0.34 ms	5.51 ms

All 12 crystal frameworks