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COMMON: Optimized MemoryPool::freeUnusedPages (if many pages are phased out at once, don't copy everything multiple times around)

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svn-id: r40292
This commit is contained in:
Max Horn 2009-05-03 22:45:46 +00:00
parent 882c24d2ee
commit 6a632b51ad
1 changed files with 8 additions and 6 deletions
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14
common/memorypool.cpp
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@ -149,14 +149,16 @@ void MemoryPool::freeUnusedPages() {
// printf("freed %d pages out of %d\n", (int)freedPagesCount, (int)_pages.size());
for (size_t i = 0; i < _pages.size(); ) {
if (_pages[i].start == NULL) {
_pages.remove_at(i);
// We just removed an entry, so we do not advance "i"
} else {
++i;
// Remove all now unused pages
size_t newSize = 0;
for (size_t i = 0; i < _pages.size(); ++i) {
if (_pages[i].start != NULL) {
if (newSize != i)
_pages[newSize] = _pages[i];
++newSize;
}
}
_pages.resize(newSize);
// Reset _chunksPerPage
_chunksPerPage = INITIAL_CHUNKS_PER_PAGE;