sootsim perf

One profiling group for the three performance surfaces: sampled JS CPU profiles via Chrome DevTools Protocol, React render-cost tables from the tenant worker, and shell-worker frame profiling for the renderer that paints app pixels.

terminal

sootsim perf cpu [options]
sootsim perf react <profile|summary|slow|rerenders|tree|why> [options]
sootsim perf shell <start|stop|transition> [options]

Options

flag	description
`--cdp-port <port>`	for `perf cpu`: Chrome DevTools port (default: $SOOTSIM_CDP_PORT or 9222)
`--duration <seconds>`	for `perf cpu`: recording duration (default: 5)
`--match <substring>`	for `perf cpu`: pick the page target by URL substring
`--output <path>`	for `perf cpu`: output .cpuprofile path
`--include-props`	for `perf react profile start`: record shallow prop previews
`--limit <n>`	for `perf react`: rows to print
`--json`	structured output where supported
`--sim <sim>`	target a specific connected sim

Examples

terminal

sootsim open 8089 --new --driver playwright --cdp-port 9222
sootsim perf cpu --cdp-port 9222 --duration 5
sootsim perf react profile start
sootsim perf react summary --limit 10
sootsim perf shell start
sootsim perf shell stop --json

Profiling Surfaces

perf cpu captures sampled JavaScript CPU profiles through CDP. Open the sim with a CDP port first:

terminal

sootsim open 8081 --new --driver playwright --cdp-port 9222
sootsim perf cpu --cdp-port 9222 --duration 5

perf react reads React render cost from the tenant worker. perf shell records shell-worker frame timing for the renderer that paints app pixels.

storage

describe

sootsim perf

sootsim perf

#Options

#Examples

#Profiling Surfaces

#Related

Ready to build?

Options

Examples

Profiling Surfaces

Related