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August 29, 2015 14:07
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Profiling discussion.
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[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. |
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