prescale 0.2.0

Launch-readiness load testing for developers - find what breaks before your users do

PreScale

Launch-readiness load testing for developers — find what breaks before your users do.

Point it at a URL. It ramps simulated traffic until something gives, then tells you, in plain English, what failed first and at what load.

pip install prescale
prescale run https://staging.myapp.com

Scale readiness: ⚠️  Survives ~90 concurrent users
First failure   errors climb at ~150 users
Likely cause    Server returned 5xx under load — likely DB pool exhaustion.

Why

• Zero config — no test scripts, no account, one command against a URL.
• Stack-agnostic — Vercel, Fly, Railway, a VPS, serverless… it just needs a URL.
• An answer, not a histogram — "you're good to ~90 users, your DB is the wall."
• Safe by default — won't hammer a non-local host until you confirm you own it.

Usage

prescale run <url> [-u MAX_USERS] [-s STAGE_SECONDS] [--latency-wall S]
                   [--error-threshold R] [-m METHOD] [--timeout S]
                   [--i-own-this] [--json]

Requires Python 3.10+. Full docs and source: https://github.com/pyjeebz/PreScale

License

Apache 2.0