Profiling discussion.

profiling.irc

[12:38:59]  <prettyrobots>	 Any nice blog posts on profiling Node.js?
[12:39:10]  <prettyrobots>	 I've run a program with `--prof`, but I can't find a way to visualize it.
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[13:08:02]  <thlorenz>	 prettyrobots: I used to be able to load v8.log into chrome://tracing, but it seems to not work anymore
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[13:08:38]  <thlorenz>	 see: https://github.com/thlorenz/v8-perf/issues/4
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[13:09:32]  <thlorenz>	 prettyrobots: this could also help: https://github.com/thlorenz/v8-profiling
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[13:09:57]  <thlorenz>	 specifically https://github.com/thlorenz/v8-profiling#processing-tick-data
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[13:23:55]  <nathan7>	 goddamnit, Dominic, please appear on IRC
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[13:50:10]  <prettyrobots>	 @thlorenz: When did it stop working. I can install an old Node.js to get to it.
[13:52:44]  <thlorenz>	 prettyrobots: not related to node, but to version of Chrome
[13:53:17]  <thlorenz>	 I'm not sure, but maybe they no longer keep this working since the Chrome Devtools timeline has part of that functionality now
[13:53:26]  <thlorenz>	 stopped working about 2 months ago
[13:53:49]  <paul_irish>	 thlorenz: you've seen profviz right
[13:54:18]  <paul_irish>	 optimizeLegibility
[13:54:21]  <paul_irish>	 whoops
[13:54:27]  <paul_irish>	 https://v8.googlecode.com/svn/trunk/tools/profviz/profviz.html <===
[13:55:29]  <thlorenz>	 paul_irish: https://github.com/thlorenz/v8-profiling#in-the-browser yeah :)
[13:56:15]  <thlorenz>	 not exactly same functionality though as chrome://tracing
[13:56:23]  <paul_irish>	 aye
[13:56:37]  <paul_irish>	 i'm not sure if it was intentional that v8 logs now fail in trace-viewer
[13:56:44]  <thlorenz>	 I miss the ability to interact with things and see my code executing in relation to v8 events like GC:Scavenge
[13:57:07]  <thlorenz>	 :( any intent to fix it or will it be deprecated in favor of devtool timeline?
[13:57:17]  <thlorenz>	 *devtools
[13:57:20]  <paul_irish>	 https://github.com/google/trace-viewer  i can cc an engineer on any issue you file
[13:57:34]  <paul_irish>	 no tracing will live for a while
[13:57:52]  <paul_irish>	 it'll only die when timeline can do everything it can
[13:57:55]  <paul_irish>	 which we're not close to yet
[13:58:29]  <thlorenz>	 wow awesome, thanks, I'll file an issue - all I can say though is that same v8 logs that could be loaded before produce undesired results now
[13:58:58]  <paul_irish>	 toss some screenshots in there
[13:59:12]  <paul_irish>	 im pretty sure we still want v8 logs to work in tracing
[13:59:13]  <paul_irish>	 so
[13:59:19]  <paul_irish>	 valid regression
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[14:23:34]  <thlorenz>	 paul_irish: https://github.com/google/trace-viewer/issues/622
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[14:29:41]  <prettyrobots>	 thlorenz: Thank you.
[14:29:50]  <thlorenz>	 prettyrobots: np :)
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[14:40:27]  <prettyrobots>	 demariuschrite: You can't see any scrollback.