For the block smaller than a page size, one block is unlikely to introduce more unused pages (at most 2 if it acrosses the page boundary and both touched pages are unused). So it's better to apply the threshold to reduce the time of scanning groups that can't release any new pages.
Compiler-RT ================================ This directory and its subdirectories contain source code for the compiler support routines. Compiler-RT is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt. ================================