[gmpi] Re: New Reqs 3.8 - Events
- From: Marc Poirier <fipnid@xxxxxxxxx>
- To: gmpi@xxxxxxxxxxxxx
- Date: Thu, 18 Dec 2003 10:34:32 -0800 (PST)
--- Jeff McClintock wrote:
> > Making timestamps relative to block-start may be easier for plugins to
> > handle, emphasizes the "there is no future" model, and saves 4 bytes
> > per event (as well as saving 64 bit math).
>
> Well..... the host has to maintain the timestamps at 64 bit accuracy, so
> you're actually imposing a conversion step on the host (a 64 bit math
> subtraction). So I'm not sure there's any overall saving by using 32bit
> timestamps. Either the host does it, or the plugin does it (converts
> timestamps to block-relative).
>
> Not too worried either way to tell the truth though.
Yeah, it seems pretty silly to be discussing performance costs of 32 vs.
64 bit for event timestamps. If there's any reason to say that 64-bit
timestamps would be useful (which I think has already been shown), then we
should just use them. The amount of CPU time that goes to handling
timestamp values is totally trivial anyway. If, by choosing 32-bit rather
than 64-bit now, we screw ourselves over at all down the road, then that
would just be so ridiculous because the performance issue doesn't even
matter at all today, and it surely will only continue to not matter more
and more to the point of ultra-not-mattering at homeopathic type levels...
Marc
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