[FFmpeg-devel] Realmedia patch

[Ronald S. Bultje]

Hi again,

On Sun, Aug 24, 2008 at 10:33 PM, Michael Niedermayer <michaelni at gmx.at> wrote:
> besides this is not exporting it is removing and adding a different one.
> That should be 2 patches
> * move
> * change implementation

Change implementation here.

Code to test:
    char buf[512];
    unsigned char src[256];

    /* init */
    for (n = 0; n < 256; n++) src[n] = n;

    for (n = 0; n < 200000; n++) {
        data_to_hex (buf, src, 256);
        for (m = 0; m < 256; m++) src[m] += buf[m];
    }

and then time ./test with old or new impl.

200000 cycles, gcc -g, old:
real    0m2.377s
user    0m2.361s
sys     0m0.008s

new:
real    0m0.900s
user    0m0.892s
sys     0m0.005s

200000 cycles, gcc -O2, old:
real    0m1.223s
user    0m1.214s
sys     0m0.006s

new:
real    0m0.272s
user    0m0.253s
sys     0m0.005s

hope that's OK enough.

Ronald
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