12 engineers on Hacker News describe using PyPy first-hand: 7 endorse it, 2 regret it, 2 are mixed.
“PyPy is pretty easy to setup, and it's free 5-10x that lets you iterate faster as soon as you start to have bigger input files”
endorse · personal · tux3 · 2024-09-02 · source ↗ · wrong label?“With Cython (finally we migrated to Pypy) we gained around 20-60x speedup.”
endorse · production · hansor · 2022-04-04 · source ↗ · wrong label?“in the end with various issues we were never able to make the switch.”
regret · production · qeternity · 2021-02-19 · source ↗ · wrong label?“With Cython/PyPy I can get things done when resources are more restricted.”
endorse · personal · hurtmyknee · 2017-09-09 · source ↗ · wrong label?“we traded about 40% speedup for 40% RAM on an app that does very little true CPU-bound tasks”
endorse · production · JulianWasTaken · 2017-08-14 · source ↗ · wrong label?“I also found that the warmup time was too much for my liking, it was several times longer than CPython's”
regret · personal · myusernameisok · 2017-08-14 · source ↗ · wrong label?“We run tests on pypy, and it for sure works.”
endorse · production · paultag · 2017-08-03 · source ↗ · wrong label?“we saw at least 10x or more increase in memory usage than cpython when we switched to pypy”
mixed · production · stock_toaster · 2015-10-16 · source ↗ · wrong label?“At work, we switched to pypy for the speed. For a spell-checker I made in python, pypy made the dictionary compiling 3x faster and the spelling 2x faster”
endorse · production · unhammer · 2015-04-30 · source ↗ · wrong label?“I really like PyPy, and we use it a lot, but those _unexpected_ crazy slowdowns are unfortunate.”
mixed · production · ant6n · 2014-12-20 · source ↗ · wrong label?“I'm using it in production, and speedups tend to be on the order of 4-5x for my app”
endorse · production · apendleton · 2014-06-21 · source ↗ · wrong label?“the database was the bottleneck on every request once we switched to PyPy”
neutral · production · RussianCow · 2015-02-15 · source ↗ · wrong label?