2 ms·

Here's a similar case from 2020: https://stackoverflow.com/a/59570825 https://stackoverflow.com/a/59570825 With a link to the V8 line of code defining the 128

Here's a similar case from 2020: https://stackoverflow.com/a/59570825 https://stackoverflow.com/a/59570825 With a link to the V8 line of code defining the 128 limit: https://github.com/v8/v8/blob/596d0ce7b7a3900c529025aaa77e5fc39162c8c5/src/hydrogen.cc#L3350 https://github.com/v8/v8/blob/596d0ce7b7a3900c529025aaa77e5f...

klelatti 4y ago
Interesting thanks. Is there a good reason for a relatively low fixed limit like this?
RichieAHB 4y ago
Worth noting that SO comment calls out that the linked line points to the code as it was in 2013 and that there have been changes since then: > The link into the V8 source code above is pretty old (2013), so I tried to find the modern equivalent. I didn't find a hard limit, but found several heuristics that decide between table lookups and tree (binary search) lookups (ia32, x86). When I plug in my numbers I don't quite get a borderline case where I found it, so I'm not sure this is the actual cause or whether there's another optimization not being triggered elsewhere.