Re^4: XS: SvPVLV examples?

How about the even faster:++ u8( $mmap, 0x12346789abcd );

or faster and simpler

my $uchar = u8( $mmap, 0x12346789abcd ); 

++$$uchar if cond;

$$uchar *= 3;
[download]

I've seen much deeper threads and never seen it as a problem.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.

"Science is about questioning the status quo. Questioning authority".

In the absence of evidence, opinion is indistinguishable from prejudice.

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Re^5: XS: SvPVLV examples? by ikegami (Patriarch) on Sep 26, 2009 at 01:47 UTC
Even then, I bet avoiding magic is still faster. `my $byte = u8( $mmap, 0x12346789abcd ); ++$byte if cond; u8( $mmap, 0x12346789abcd, $byte * 3 );` [download] If you search PM, you'll find benchmarks between 4-arg and l-lvalue substr. I don't remember how much slower the latter is, but it's quite a bit slower.	[reply] [d/l]