HTTP server & framework benchmarks

klein benchmark results

klein 24.8 is a python web framework. At concurrency 64 it serves 4 631 requests per second with a P50 latency of 13.72 ms, ranking 355 of 383 overall and 34 of 46 among python frameworks.

Language: python 3.14
Framework version: 24.8
Website: https://github.com/twisted/klein
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Throughput, latency & reliability

All measured metrics for klein 24.8, by concurrency level.
Metric	Concurrency 64	Concurrency 256	Concurrency 512
Requests / second	4 631	4 397	4 519
P50 latency	13.72 ms	57.66 ms	110.60 ms
P75 latency	14.04 ms	58.46 ms	112.25 ms
P90 latency	14.32 ms	59.47 ms	114.98 ms
P99 latency	17.47 ms	75.81 ms	136.31 ms
P99.999 latency	31.59 ms	314.41 ms	2416.98 ms
Average latency	13.82 ms	56.28 ms	107.05 ms
Minimum latency	7.06 ms	10.51 ms	6.78 ms
Standard deviation	1.43 ms	9.73 ms	68.12 ms
Total requests	69 472	65 967	67 804
Bytes received	9.47 MB	8.99 MB	9.24 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 klein on requests per second.
Concurrency	Overall	Among python frameworks
64	355 of 383	34 of 46
256	359 of 383	34 of 46
512	359 of 383	34 of 46

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Explore python frameworks

Fastest python frameworks at concurrency 64.
#	Framework	Requests / second	P50 latency	P99 latency
1	peregrine-wsgi 1.1	191 025	0.30 ms	0.85 ms
2	weft-wsgi 0.1	153 346	0.41 ms	0.52 ms
3	fastpysgi-wsgi 0.6	147 137	0.46 ms	0.58 ms
4	peregrine-asgi 1.1	118 540	0.55 ms	0.68 ms
5	weft-asgi 0.1	118 218	0.53 ms	0.79 ms
6	oxapy 0.11	85 921	0.73 ms	1.34 ms
7	peregrine-blacksheep 2.6	74 401	0.95 ms	1.14 ms
8	emmett 2.7	47 667	1.27 ms	2.98 ms
9	asgineer 0.9	43 752	1.46 ms	2.09 ms
10	mq-bridge-py 0.2	41 435	1.63 ms	1.86 ms

All 46 python frameworks