fastapi 0.141 benchmark results

fastapi 0.141 is a python web framework. At concurrency 64 it serves 42 276 requests per second with a P50 latency of 1.24 ms, ranking 273 of 358 overall and 17 of 37 among python frameworks.

Language: python 3.14
Framework version: 0.141
Website: http://fastapi.tiangolo.com
Open in the interactive charts: compare fastapi

All measured metrics for fastapi 0.141, by concurrency level.
Metric	Concurrency 64	Concurrency 256	Concurrency 512
Requests / second	42 276	49 922	52 028
P50 latency	1.24 ms	4.54 ms	8.73 ms
P75 latency	2.01 ms	6.32 ms	11.46 ms
P90 latency	2.92 ms	8.37 ms	14.82 ms
P99 latency	4.87 ms	17.31 ms	38.25 ms
P99.999 latency	12.65 ms	56.83 ms	161.48 ms
Average latency	1.53 ms	5.17 ms	9.90 ms
Minimum latency	0.17 ms	0.34 ms	0.37 ms
Standard deviation	1.05 ms	3.31 ms	7.05 ms
Total requests	634 189	749 068	780 901
Bytes received	80.61 MB	95.22 MB	99.26 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

Rank

Position of fastapi on requests per second.
Concurrency	Overall	Among python frameworks
64	273 of 358	17 of 37
256	266 of 358	17 of 37
512	263 of 358	17 of 37

Other python frameworks

Fastest python frameworks at concurrency 64.
#	Framework	Requests / second	P50 latency	P99 latency
1	oxapy 0.11	158 749	0.38 ms	0.84 ms
2	fastpysgi-wsgi 0.6	153 823	0.36 ms	0.66 ms
3	asgineer 0.9	94 940	0.63 ms	1.77 ms
4	lihil 0.2	88 479	0.62 ms	1.57 ms
5	sanic 25.12	86 796	0.63 ms	2.05 ms
6	blacksheep 2.6	81 792	0.59 ms	2.59 ms
7	mq-bridge-py 0.2	80 833	0.79 ms	1.18 ms
8	baize-asgi 0.20	79 094	0.71 ms	2.20 ms
9	emmett 2.7	77 656	0.73 ms	2.39 ms
10	panther 5.5	76 924	0.69 ms	2.77 ms

All 37 python frameworks