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

[Dmitry Gutov]

On 04.04.2020 19:45, Eli Zaretskii wrote:
> Also, how many GC's and the time they took did benchmark report?

I showed such outputs before.

Now, with an -Og build, here are outputs of several consecutive runs:

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)

(The first one right after Emacs was started).

> With
> such short timings and running the test only once,

I always run it several times, discarding the first result because the 
FS cache is likely cold that iteration. The buffer is killed between 
runs, of course.

> the difference GC
> could make might be significant, so if different runs and different
> people here have different numbers of GC, we could be comparing apples
> with oranges.

In an optimized build, it's always < 0.2s here. And I gave an average 
number. It's not my first time benchmarking either.