4 ms·
It looks like OP is victim of something similar to https://sourceware.org/bugzilla/show_bug.cgi?id=23416 https://sourceware.org/bugzilla/show_bug.cgi?id=23416,
by glandium 8y ago
It looks like OP is victim of something similar to https://sourceware.org/bugzilla/show_bug.cgi?id=23416 https://sourceware.org/bugzilla/show_bug.cgi?id=23416, and malloc_trim is only papering over it.