Dev Tools · 1d ago
Vercel Precompiles Python Bytecode to Halve Cold Start Times
Vercel now compiles Python functions to bytecode at build time, skipping the compilation step at startup. Benchmarks show median cold starts dropped from 2.8s to 1.3s. Functions near the size limit see smaller gains, but no code changes are required.
Meridian48 take
A practical optimization that reduces cold starts without developer effort, though gains are limited for larger functions.
vercelpython-performance