>The idea of inlining is to remove function prologues and epilogues. When you >set -fno-inline, the functions do not get inlined and the prologues and >epilogues account for the slight increase in size. In other words -Os use good threshold size (better then just 0) to make decision if function should be inlined. My mistake I was (don't know why) convinced -Os implies -fno-inline. Thanks. -- Best regards Ilja Golshtein