My resulting asmjs outputs are massive and it's making me sad! I've tracked
most of the size down to ios_base's global initializer (and the world that
it pulls in) -- even though I'm not using iostream (or really much of
anything) and was wondering if anyone had a way to get around this.
My hello world sample compiles to 6KiB, but if I include <string> and add a
single `std::string foo;` it jumps up ~100KiB (even in -O2 with --llvm-lto
1).
The big difference in output comes down to this:
```
function __GLOBAL__I_000101() {
var label = 0, sp = 0;
sp = STACKTOP;
__ZNSt3__18ios_base4InitC2Ev(0);
return;
}
+ a billion functions called by ios_base::Init.
```
That ios_base::Init pulls in locale and a bunch of other stuff that is only
ever called from that stack. Because it's a global initializer dead-code
removal won't get rid of it and it ends up in my final output. It seems a
bit silly that even when not using iostream (cin/cout/strstream/etc) I
still take a massive hit.
I found this issue from a year or so ago which seems like exactly what I'm
seeing:
https://github.com/kripken/emscripten/issues/2545
Unfortunately the fix proposed never made it
in: https://github.com/kripken/emscripten/pull/3308
Besides not using std::string anywhere (which is extremely difficult given
the code I'm compiling) has anyone found solutions for removing this bloat?
Is there any emscripten features (in-progress or planned) that will help
situations like this?
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