I looked up specifically examples of this and didn’t find answers, they’re buried in general discussions about why compiling may be better than pre-built. The reasons I found were control of flags and features, and optimizations for specific chips (like Intel AVX or ARM Neon), but to what degree do those apply today?
The only software I can tell benefits greatly from building from source, is ffmpeg since there are many non-free encoders decoders and upscalers that can be bundled, and performance varies a lot between devices due to which of them is supported by the CPU or GPU. For instance, Nvidia hardware encoders typically produce higher quality video for similar file sizes than ones from Intel AMD or Apple. Software encoders like x265 has optimizations for AVX and NEON (SIMD extensions for CPUs).
Anecdotally: the night Mozilla builds were a godsend when I couldn’t afford decent hardware.
Also anecdotally and professionally: when you have a client that insists on using source like most software companies do nowadays; you can use that source along with something like a hash to keep them honest and prevent them from leaving you holding the bag when shtf. (ask me how I know this works. Lol)
I don’t know much about them, do you happen to know why the nightly builds were better? Did the new features fix a problem?
i wasn’t using the main build; i was using a minimalist build on my ancient laptop and i struggle to remember what it was called now.