perf-sym

perf-sym

Translate symbol names generated by --basic-perf-prof into JavaScript names

Install

[sudo] npm i -g perf-sym

Usage

  cat stacks.out | perf-sym <pid>

  --relative=[path] -r=[path] [false]
  --keep-addr -k [false]
  --no-v8-internals --no-v8 [true]
  --no-sys-internals --no-sys [false]
  --no-gc-internals --no-gc [false] (--no-v8 must be false to apply)
  --no-unresolved --no-ur [false]

Generate a flamegraph

OS X

Requirements

[sudo] npm install -g stackvis

[sudo] npm install -g cpuprofilify

sudo echo # need me some sudo perms

node --perf-basic-prof index.js &

export PID=$!

(sudo profile_1ms.d -p $PID  > stacks.out; kill -s INT $PID) &

npm test

sudo killall dtrace

cat stacks.out | perf-sym -r initial --no-sys $PID | stackvis perf > flamegraph.html

open flamegraph.html

Linux

Requirements

[sudo] npm install -g stackvis

node --perf-basic-prof index.js &

export PID=$!

(perf record -p $PID -i -g -e cycles:u; perf script > stacks.out; kill -s INT $PID) &

npm test

killall perf; killall perf

cat stacks.out | perf-sym -r initial --no-sys $PID | stackvis perf > flamegraph.html

open flamegraph.html