HTTP server & framework benchmarks

http4s benchmark results

http4s 0.23 is a scala web framework. At concurrency 64 it serves 66 705 requests per second with a P50 latency of 2763.09 ms, ranking 250 of 387 overall and 5 of 5 among scala frameworks.

Language: scala 3.9
Framework version: 0.23
Website: https://http4s.org
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Throughput, latency & reliability

All measured metrics for http4s 0.23, by concurrency level.
Metric	Concurrency 64	Concurrency 256	Concurrency 512
Requests / second	66 705	48 473	63 557
P50 latency	2763.09 ms	3068.25 ms	2206.55 ms
P75 latency	5051.05 ms	5419.69 ms	4404.22 ms
P90 latency	6531.07 ms	6936.58 ms	6259.37 ms
P99 latency	7437.65 ms	8295.08 ms	8757.25 ms
P99.999 latency	7608.32 ms	8957.27 ms	9703.42 ms
Average latency	3048.21 ms	3300.40 ms	2744.62 ms
Minimum latency	0.10 ms	0.10 ms	0.10 ms
Standard deviation	2343.18 ms	2518.94 ms	2432.09 ms
Total requests	931 518	647 080	847 071
Bytes received	124.66 MB	86.56 MB	113.36 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 http4s on requests per second.
Concurrency	Overall	Among scala frameworks
64	250 of 387	5 of 5
256	281 of 387	5 of 5
512	242 of 387	5 of 5

Explore scala frameworks

Fastest scala frameworks at concurrency 64.
#	Framework	Requests / second	P50 latency	P99 latency
1	zio-http 3.11	108 419	1509.55 ms	5386.92 ms
2	cask 0.11	103 966	1766.57 ms	5748.74 ms
3	pekkohttp 1.7	87 643	2147.50 ms	6472.36 ms
4	play 3.0	74 628	2414.93 ms	6981.63 ms

All 5 scala frameworks