VTE w/ new patch makes skip frame (feel slow) when type..

[Jeremy Messenger]

Thanks for commit it! :-)

Cheers,
Mezz

On Sat, 10 Apr 2004 20:07:14 -0400, Joe Marcus Clarke 
<marcus at marcuscom.com> wrote:

> On Sat, 2004-04-10 at 18:24, Jeremy Messenger wrote:
>> Hello,
>>
>> I can type very fast and I hold down key like down or up pretty often 
>> for
>> PR. With the new patch of VTE that has been added looks like this:
>>
>> files/patch-src_vte.c:
>> =======================================
>> [...]
>>
>> -#define VTE_CHILD_INPUT_PRIORITY	G_PRIORITY_DEFAULT_IDLE
>> +#define VTE_CHILD_INPUT_PRIORITY	G_PRIORITY_LOW
>>
>> [...]
>>
>> -#define VTE_COALESCE_TIMEOUT		2
>> +#define VTE_COALESCE_TIMEOUT		50
>> =======================================
>>
>> This cause the type 'feel like' slow, but itself is faster than before 
>> in
>> the benchmark (below). I am not sure what's right word for it but it's
>> almost like game or video frame per sec. However, with this patch; it
>> skips the frame that make it fee like slow. If I remove above patch and 
>> it
>> feels much more smoother and faster. So... I decided to try to change 
>> from
>> 50 to 25/15 and it works a lot better!
>
> I guess this depends on the video card.  I tested this patch for a long
> time, and never noticed an interactivity slow-down.  However, that
> number is really a "feel" kind of thing.  Let's face it, vte is slow,
> and it just takes tweaking to get it to feel better.
>
> I'll play with 15 some, and see what I find.
>
>>
>> Benchmark:
>> =======================================
>> $ time ls -R /usr/ports
>>
>> With above patch:
>> 	13.91 real	0.24 user	1.13 sys
>> 	hold 'a' key and skip frame like at the every three 'a'; it feels 
>> slower.
>>
>> With above patch and 50 -> 25:
>> 	13.91 real	0.33 user	1.04 sys
>> 	hold 'a' key and no skip frame; it feels smoother and faster.
>>
>> With above patch and 50 -> 15:
>> 	14.08 real	0.28 user	1.08 sys
>> 	hold 'a' key and no skip frame; it feels smoother and faster.
>>
>> Without above patch:
>> 	21.89 real	0.28 user	1.12 sys
>> 	hold 'a' key and no skip frame; it feels smoother and faster.
>> =======================================
>>
>> So far, I think 15 is the better number to use because it feels more
>> smoother and faster. Also, that include in the real benchmark is still
>> fast. Can anyone test the default one from offical ports tree then try
>> this patch (vte.diff) in attach?
>>
>> Off point, I played with the benchmark:
>> =======================================
>> $ time ls -R /usr/ports
>>
>> aterm: 3.40 real	0.47 user	1.23 sys
>> xterm: 6.47 real	0.34 user	1.38 sys
>> gnome: 13.91 real	0.33 user	1.04 sys
>> =======================================
>
> Be careful.  When doing benchmarks, you want to make sure you just don't
> run one after the other, and time them.  The first one will be extra
> slow as it builds the inode cache.  What I did was run a full ls -lR in
> xterm, then immediately ran it again and timed it.  then I repeated for
> gnome-terminal.  I found xterm to be exceptionally fast (much faster
> than your numbers here).
>
> Joe
>
>>
>> Cheers,
>> Mezz


-- 
bsdforums.org 's moderator, mezz.