This feature improves the performance substantially when you want to serve constant responses like simple strings, simple JSON payloads, etc.
Benchmark Source: https://github.com/sansyrox/robyn-comparrison-benchmarks
What's Changed
New Syntax
@app.get("/", const=True) # see the 'const' flag here
async def h(_):
return "Hello, world!"
Performance upgrade
Robyn (6 workers)
➜ ~ oha --no-tui --insecure -c 100 -n 1000000 http://127.0.0.1:5000
Summary:
Success rate: 1.0000
Total: 1.9902 secs
Slowest: 0.0477 secs
Fastest: 0.0000 secs
Average: 0.0002 secs
Requests/sec: 502470.8499
Total data: 12.40 MiB
Size/request: 13 B
Size/sec: 6.23 MiB
Response time histogram:
0.000 [2608] |
0.000 [85802] |■■■■■■
0.000 [320394] |■■■■■■■■■■■■■■■■■■■■■■
0.000 [456025] |■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■
0.000 [88243] |■■■■■■
0.000 [13397] |
0.000 [6279] |
0.000 [4146] |
0.000 [2887] |
0.001 [2356] |
0.001 [17863] |■
Latency distribution:
10% in 0.0001 secs
25% in 0.0002 secs
50% in 0.0002 secs
75% in 0.0002 secs
90% in 0.0002 secs
95% in 0.0003 secs
99% in 0.0008 secs
Details (average, fastest, slowest):
DNS+dialup: 0.0052 secs, 0.0001 secs, 0.0196 secs
DNS-lookup: 0.0000 secs, 0.0000 secs, 0.0000 secs
Status code distribution:
[200] 1000000 responses
FastAPI
➜ ~ oha --no-tui --insecure -c 100 -n 1000000 http://127.0.0.1:5001
Summary:
Success rate: 1.0000
Total: 12.2921 secs
Slowest: 0.0471 secs
Fastest: 0.0001 secs
Average: 0.0012 secs
Requests/sec: 81353.0018
Total data: 12.40 MiB
Size/request: 13 B
Size/sec: 1.01 MiB
Response time histogram:
0.000 [127872] |■■■■■■■■■■■■■■■■■■■■
0.001 [178274] |■■■■■■■■■■■■■■■■■■■■■■■■■■■
0.001 [199031] |■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■
0.001 [204123] |■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■
0.002 [126955] |■■■■■■■■■■■■■■■■■■■
0.002 [80915] |■■■■■■■■■■■■
0.002 [33556] |■■■■■
0.003 [11592] |■
0.003 [5180] |
0.003 [3270] |
0.004 [29232] |■■■■
Latency distribution:
10% in 0.0004 secs
25% in 0.0007 secs
50% in 0.0011 secs
75% in 0.0015 secs
90% in 0.0020 secs
95% in 0.0024 secs
99% in 0.0058 secs
Details (average, fastest, slowest):
DNS+dialup: 0.0113 secs, 0.0001 secs, 0.0451 secs
DNS-lookup: 0.0000 secs, 0.0000 secs, 0.0001 secs
Status code distribution:
[200] 1000000 responses
Starlette (24 workers)
➜ ~ oha --no-tui --insecure -c 100 -n 1000000 http://127.0.0.1:5003
Summary:
Success rate: 1.0000
Total: 9.8807 secs
Slowest: 0.0534 secs
Fastest: 0.0001 secs
Average: 0.0010 secs
Requests/sec: 101207.5486
Total data: 12.40 MiB
Size/request: 13 B
Size/sec: 1.25 MiB
Response time histogram:
0.000 [128086] |■■■■■■■■■■■■■■■■■■■
0.001 [206731] |■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■
0.001 [211417] |■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■
0.001 [174363] |■■■■■■■■■■■■■■■■■■■■■■■■■■
0.001 [120210] |■■■■■■■■■■■■■■■■■■
0.002 [69490] |■■■■■■■■■■
0.002 [32373] |■■■■
0.002 [13678] |■■
0.002 [6528] |
0.003 [4052] |
0.003 [33072] |■■■■■
Latency distribution:
10% in 0.0003 secs
25% in 0.0005 secs
50% in 0.0008 secs
75% in 0.0012 secs
90% in 0.0016 secs
95% in 0.0020 secs
99% in 0.0053 secs
Details (average, fastest, slowest):
DNS+dialup: 0.0368 secs, 0.0077 secs, 0.0520 secs
DNS-lookup: 0.0000 secs, 0.0000 secs, 0.0001 secs
Status code distribution:
[200] 1000000 responses
Flask (Bjoern)
➜ ~ oha --no-tui --insecure -c 100 -n 1000000 http://127.0.0.1:5000
Summary:
Success rate: 1.0000
Total: 113.6806 secs
Slowest: 0.1515 secs
Fastest: 0.0021 secs
Average: 0.0114 secs
Requests/sec: 8796.5722
Total data: 12.40 MiB
Size/request: 13 B
Size/sec: 111.67 KiB
Response time histogram:
0.005 [68] |
0.008 [246] |
0.011 [417517] |■■■■■■■■■■■■■■■■■■■■■■■
0.014 [558015] |■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■
0.017 [16685] |
0.020 [2962] |
0.022 [2796] |
0.025 [1357] |
0.028 [86] |
0.031 [187] |
0.034 [81] |
Latency distribution:
10% in 0.0099 secs
25% in 0.0102 secs
50% in 0.0112 secs
75% in 0.0123 secs
90% in 0.0129 secs
95% in 0.0133 secs
99% in 0.0157 secs
Details (average, fastest, slowest):
DNS+dialup: 0.0352 secs, 0.0001 secs, 0.0509 secs
DNS-lookup: 0.0000 secs, 0.0000 secs, 0.0000 secs
Status code distribution:
[200] 1000000 responses
System Config
eeeee eeeeeeeeeeee eeeee OS: elementary OS 6.1 Jólnir x86_64
eeee eeeee eee eeee Kernel: 5.13.0-51-generic
eeee eeee eee eeee Uptime: 12 hours, 28 mins
eee eee eee eee Packages: 2369 (dpkg), 11 (flatpak), 12 (snap)
eee eee eee eee Shell: zsh 5.8
ee eee eeee eeee Resolution: 3840x2160, 2160x3840
ee eee eeeee eeeeee DE: Pantheon
ee eee eeeee eeeee ee WM: Mutter(Gala)
eee eeee eeeeee eeeee eee Theme: io.elementary.stylesheet.blueberry [GTK3]
eee eeeeeeeeee eeeeee eee Icons: elementary [GTK3]
eeeeeeeeeeeeeeeeeeeeeeee eeeee Terminal: alacritty
eeeeeeee eeeeeeeeeeee eeee Terminal Font: DankMono Nerd Font
eeeee eeeee CPU: AMD Ryzen 9 5900X (24) @ 4.000GHz
eeeeeee eeeeeee GPU: NVIDIA 09:00.0 NVIDIA Corporation Device 2489
eeeeeeeeeeeeeeeee Memory: 6090MiB / 64214MiB
Full Changelog: v0.16.6...v0.17.0