Load & performance

Plan a load test

Take a test you already have and run it over and over, several copies at a time, for a fixed stretch of time. Every copy is a real browser driving the real application, so what you get back is what a user would actually feel — including which step slows down, not just that something did.

This machine a virtual user is a real Chromium, so the ceiling is physical

15.8 GB RAM and 4 CPU(s): ~400 MB per browser leaves room for about 12 at once. Comfortable starting point: 5 at once; hard ceiling on this box: 12.

Recent load runs

#	Test	Status	Users	Window	Passes	p95	vs baseline	Started
#2	DEMO-018	finished	6	1m 30s	130	3.899s	1.72×	Sep 24 18:54
#1	DEMO-018	finished	6	1m 30s	129	3.772s	1.78×	Sep 24 18:50

Saved plans re-run the same shape of load after a change

Plan	Test	Users	Window
Quick smoke (90s, 2 users) A short one for checking the setup works before committing ten minute…	DEMO-007	2	1m 30s	Run again
Quick smoke (90s, 3 users) Three browsers tracking shipments for a minute and a half: enough to …	DEMO-018	3	1m 30s	Run again
Rush hour (5 min, 6 users) Six browsers for five minutes, ramped over the first minute. Compare …	DEMO-018	6	5m 00s	Run again
Ten minute soak (4 users) The worked example: hold 4 simultaneous browsers on the app for 10 mi…	DEMO-007	4	10m 00s	Run again