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Trim off some function call overhead.

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This commit is contained in:
Alcaro 2014-02-12 00:26:06 +01:00
parent 3f820917e6
commit 001dd895bf
1 changed files with 6 additions and 3 deletions
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9
rewind-alcaro.c
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@ -309,9 +309,10 @@ static const void * pull(struct rewindstack * this_)
uint16_t numchanged=*(compressed16++);
if (numchanged)
{
uint16_t numunchanged=*(compressed16++);
out16+=numunchanged;
memcpy(out16, compressed16, numchanged*sizeof(uint16_t));
out16+=*(compressed16++);
//we could do memcpy, but it seems that function call overhead is high
// enough that memcpy's higher speed for large blocks won't matter
for (int i=0;i<numchanged;i++) out16[i]=compressed16[i];
compressed16+=numchanged;
out16+=numchanged;
}
@ -366,7 +367,9 @@ struct rewindstack * rewindstack_create(size_t blocksize, size_t capacity)
this->data=NULL;
this->thisblock=NULL;
this->nextblock=NULL;
this->capacity=0;
this->blocksize=0;
reset((struct rewindstack*)this, blocksize, capacity);