+1 to using globalThis, and falling back to the current approach or a more
robust polyfilling mechanism <https://mathiasbynens.be/notes/globalthis>.
On Tuesday, June 25, 2019 at 5:29:21 PM UTC+2, Lilit Darbinyan wrote:
>
> embind currently generates the following glue code for accessing the
> global object:
>
> function emval_get_global() { return (function(){
> return Function;
> })()('return this')(); }
>
>
> This function is called every time we access emscripten::val::global()
> from C++, e.g.
>
> val Object = val::global("Object");
>
> It turns out it's pretty slow in SpiderMonkey - running this function in a
> loop 10,000 times we see that it takes on average 117 ms in SpiderMonkey
> compared to 17 ms in V8.
>
> I shall raise this slowness issue with SpiderMonkey separately, but I am
> wondering if there is room for improvement here on the emscripten side as
> well - for example, would it make sense to cache this value, or make use of
> the new globalThis
> <https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/globalThis>
>
> instead?
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