Daan De Meyer
d390e23673
Most lookups find the range in the window of their category. On such a hit, mmap_cache_fd_get() still calls category_attach_window(), which returns without doing anything because the window is attached already. mmap_cache_fd_get() also gets the cache through mmap_cache_fd_cache(), which is not inlined. Set the flag and return directly on a hit. Reading 1M entries of a real journal takes 1.3% fewer cycles.
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