@Sam Tygier - re comment #135 - unless I am understanding what I've read in the Mozilla bugs incorrectly, -Os seems to be an alternative to -O1/O2/O3, and as such, is separate to PGO. Is this correct, and if so what should I look for in about:buildconfig to confirm the use of PGO? I couldn't find this in the Mozilla bugs.
Note that we should also build with -O3 to get the best out of PGO - see https:/ /bugzilla. mozilla. org/show_ bug.cgi? id=590181
@Sam Tygier - re comment #135 - unless I am understanding what I've read in the Mozilla bugs incorrectly, -Os seems to be an alternative to -O1/O2/O3, and as such, is separate to PGO. Is this correct, and if so what should I look for in about:buildconf ig to confirm the use of PGO? I couldn't find this in the Mozilla bugs.