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Re: Tooltips GC overhead
From: |
Nix |
Subject: |
Re: Tooltips GC overhead |
Date: |
Mon, 10 Aug 2015 18:05:00 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux) |
On 8 Aug 2015, David Kastrup uttered the following:
> Stefan Monnier <address@hidden> writes:
>
>>> The cost you're trying to defend against here is a mispredicted branch
>>
>> No, I assume the branch would be properly predicted since it would
>> always take the same path.
>
> If cons is encountered with high frequency. But of course, if it is
> not, why bother in the first place?
In that case I have no idea what you're trying to defend against. The
cost of a single conditional and predicted branch is drowned in the
overhead of the allocation that cons has to do anyway. I'd be astonished
if you could ever see any performance impact whatsoever.
--
NULL && (void)
- Re: Tooltips GC overhead, (continued)
- Re: Tooltips GC overhead, Stefan Monnier, 2015/08/07
- Re: Tooltips GC overhead, Eli Zaretskii, 2015/08/07
- Re: Tooltips GC overhead, Stefan Monnier, 2015/08/07
- Re: Tooltips GC overhead, Eli Zaretskii, 2015/08/08
- Re: Tooltips GC overhead, David Kastrup, 2015/08/08
- Re: Tooltips GC overhead, Paul Eggert, 2015/08/07
- Re: Tooltips GC overhead, Eli Zaretskii, 2015/08/07
- Re: Tooltips GC overhead, Nix, 2015/08/08
- Re: Tooltips GC overhead, Stefan Monnier, 2015/08/08
- Re: Tooltips GC overhead, David Kastrup, 2015/08/08
- Re: Tooltips GC overhead,
Nix <=
- Re: Tooltips GC overhead, David Kastrup, 2015/08/10