The prep-script.sh will setup the latest Node and install the latest perf version on your Linux box.
When you want to generate the flame graph, run the following (folder locations taken from install script):
# expose kernel pointers to perf
# because of /proc/kallsyms; with kernel.kpt_restrict=1, the symbol addresses are hidden
sudo sysctl kernel/kptr_restrict=0
perf record -i -g -e cycles:u -- ~/sources/node/node --perf-basic-prof script.js
| // based off of https://gist.github.com/creationix/5544019 | |
| // these could probably be condensed more, but I'm just doing this | |
| // quickly | |
| exports = module.exports = run; | |
| exports.call = call; | |
| exports.invoke = invoke; | |
| exports.bind = bind; |
| class Point | |
| constructor: (@x = 0, @y = 0) -> | |
| if isNaN(@x) or isNaN(@y) | |
| throw new Error('Invalid coords') | |
| add: (point) -> | |
| @x += point.x | |
| @y += point.y | |
| subtract: (point) -> |
| /** | |
| * Overwrites default Mousetrap.bind method to optionally accept | |
| * an object to bind multiple key events in a single call | |
| * | |
| * You can pass it in like: | |
| * | |
| * Mousetrap.bind({ | |
| * 'a': function() { console.log('a'); }, | |
| * 'b': function() { console.log('b'); } | |
| * }); |