Re: Reliable after-change-functions (via: Using incremental parsing in Emacs)

[Dmitry Gutov]

On 04.04.2020 20:47, Eli Zaretskii wrote:
> > Elapsed time: 0.912808s (0.125516s in 7 GCs)
> > Elapsed time: 0.772653s (0.077285s in 4 GCs)
> > Elapsed time: 0.769371s (0.076361s in 4 GCs)
> > Elapsed time: 0.776261s (0.077395s in 4 GCs)
> > [...]
> > In an optimized build, it's always < 0.2s here.
> So we are looking at -O2 being about 3 to 5 times faster than -Og,
> right?  That's a speedup that is more than I'd expect, but still
> nowhere near an order of magnitude that Alan's timings seemed to show.

0.76 / 0.13 ~= 5.86

Alan's difference is bigger, but not by much:

1.24 / 0.18 ~= 6.88
1.18 (from another email) / 0.18 ~= 6.55

Which probably makes sense given different CPU architectures.