flask 3.1 benchmark results

flask 3.1 is a python web framework. At concurrency 64 it serves 7 583 requests per second with a P50 latency of 11.22 ms, ranking 337 of 358 overall and 30 of 37 among python frameworks.

Language: python 3.14
Framework version: 3.1
Website: http://www.palletsprojects.com/p/flask/
Open in the interactive charts: compare flask

All measured metrics for flask 3.1, by concurrency level.
Metric	Concurrency 64	Concurrency 256	Concurrency 512
Requests / second	7 583	8 953	8 308
P50 latency	11.22 ms	9.31 ms	49.87 ms
P75 latency	16.70 ms	37.67 ms	114.74 ms
P90 latency	23.02 ms	131.99 ms	180.44 ms
P99 latency	36.37 ms	288.09 ms	413.91 ms
P99.999 latency	50.11 ms	406.49 ms	542.29 ms
Average latency	12.23 ms	40.56 ms	81.12 ms
Minimum latency	0.43 ms	0.47 ms	0.47 ms
Standard deviation	8.16 ms	68.19 ms	92.17 ms
Total requests	113 767	134 331	124 708
Bytes received	16.53 MB	19.53 MB	18.09 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 flask on requests per second.
Concurrency	Overall	Among python frameworks
64	337 of 358	30 of 37
256	336 of 358	30 of 37
512	336 of 358	30 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