On Tue, Jan 27, 2015 at 8:45 AM, Alecazam <[email protected]> wrote:

> Anyone had any luck profiling without mangled C++ names in any browser?
> I tried setting the displayName on the functions to one demangled by
> Emscripten's demangle call, but the profilers don't seem to even look at
> this.  I could also see setting demangled function names before
> minification, so that optimized builds could be profiled with some
> semblence of where time was going.
>
> Source maps have just never worked for me either.  I'm assuming no one is
> using them.  With -g4 specified, the link generate 10 GB+ of data and slows
> to a crawl (6+ minutes of hard SSD trashing).   This would be a good
> feature to get working (and not kill the build times).   Debug builds seem
> to build/link in almost no time.  It seems like a lot of Emscripten dev is
> just praying that I don't have to go into the raw asm.js.
>

You can learn pretty quickly to read mangled names to get the basics of
what is going on.  From there, c++filt on the command line will help you
with some of the trickier things.

I don't use source maps (they've never worked for me either).

I do builds with varying -g levels and read the generated JS (un-minified
and pretty-printed).  It works out pretty well once you understand the
basics.

I'm working on a blog post series to cover a lot of the basics of working
at this level ... I hope to post something by the end of the week.

 - Bruce

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