Re: [RFC] cleanup patches for strings

[cutaway]

Congratulations, you proved that a register push is faster than a 3 byte
memory push.  I believe this is exactly what I said would happen if the
autovar pointer wound up being enregistered.

However, it is NOT what GCC will generate for pushing params to static
strings.

For that you're going to get a 5 byte PUSH imm32.


----- Original Message ----- 
From: "Denis Vlasenko" <vda@xxxxxxxxxxxxx>
To: <cutaway@xxxxxxxxxxxxx>; "Jesper Juhl" <juhl-lkml@xxxxxx>;
"linux-kernel" <linux-kernel@xxxxxxxxxxxxxxx>
Cc: "Andrew Morton" <akpm@xxxxxxxx>; "Jeff Garzik" <jgarzik@xxxxxxxxx>;
"Domen Puncer" <domen@xxxxxxxxxxxx>
Sent: Tuesday, June 21, 2005 09:06
Subject: Re: [RFC] cleanup patches for strings

Took 9574 CPU cycles Took 8068 CPU cycles


>   40:   ff 75 f8                pushl  0xfffffff8(%ebp)
>   43:   58                      pop    %eax


>   80:   53                      push   %ebx
>   81:   58                      pop    %eax

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