Optimize cache-misses on sds free

[jschmieg]

This change is 

[michalbiesek]

Reviewable status: 0 of 4 files reviewed, 2 unresolved discussions (waiting on @jschmieg and @michalbiesek)

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src/object.c, line 289 at r1 (raw file):

    }
}

nit: remove one newline - one is sufficient here

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src/sds.c, line 192 at r1 (raw file):

static inline int sdsHdrSizeOptim(char* s) {
    switch((uintptr_t)s%8) {
	case 1:

please use spaces instead of tabs. Can we move this function upper see that inline functions are defined in the beginning?

[michalbiesek]

Reviewable status: 0 of 4 files reviewed, 2 unresolved discussions (waiting on @jschmieg and @michalbiesek)

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src/sds.c, line 66 at r2 (raw file):

%8

Instead of "%8" can we use "&7" the result is the same but the second form is more efficient. The compiler with optimization will probably turn this in the same code but if you see e.g. siphash.c file there you have usage of the version with the bitwise operator and I prefer not to rely on the compiler itself as this is a pretty common pattern

[michalbiesek]

Reviewed 2 of 4 files at r1, 2 of 2 files at r2, 2 of 2 files at r4.
Reviewable status: complete! all files reviewed, all discussions resolved