https://codereview.chromium.org/1235153006/diff/20001/src/parser.cc
File src/parser.cc (right):
https://codereview.chromium.org/1235153006/diff/20001/src/parser.cc#newcode4333
src/parser.cc:4333: // let <rest_params> = [];
Just throwing this out there, not saying we should do this (now):
Would it be a valid desugaring to pre-allocate the array to the correct
length and then use ordinary [[Put]] operations to populate it? Or am I
missing some JavaScript magic that makes this observable? Basically have
something like the following:
let <rest_length> = %_ArgumentsLength() - <rest_index>;
let <rest_params> = new $PremordialArray(<rest_length>);
for (int i = 0; i < <rest_length>; ++i) {
<rest_params>[i] = %_Arguments(i + <rest_index>);
}
Again, not intended to be actionable feedback right now, just a
question.
https://codereview.chromium.org/1235153006/
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