[captaincrunch]

This is fast, READABLE, and accurate:

bool is_leap_year(uint32_t y) { // Works for Gregorian years in range [0, 65535] return ((!(y & 3)) && ((y % 25 != 0) || !(y & 15))); }

[andrepd]

This impl is mentioned in TFA.. It's much slower and includes branches.

[hoten]

I'd expect even without optimizations on, there wouldn't be branches in the output for that code.

[windward]

>READABLE

Great. It will be useful for the exhaustive tests of the faster version.

[kragen]

You commented out your entire function body and the closing }. Also, on 32-bit platforms, it doesn't stop working at 65535.

[captaincrunch]

just a formatting issue on my side, there were \n.