[Engine-devel] Switched to thread-based GWT worker factory

Hi guys, with patch [1] merged into master, GWT compiler will now use only thread-based GWT worker factory (ThreadedPermutationWorkerFactory) when compiling WebAdmin & UserPortal GUI. [1] http://gerrit.ovirt.org/#/c/25163/ In practice, this means that GWT compiler will spawn up to: max_worker_threads = min(localWorkers, 4) when compiling specific permutations (i.e. browser x locale). Note that localWorkers value can be controlled through: EXTRA_BUILD_FLAGS="-Dgwt.compiler.localWorkers=..." DEV_EXTRA_BUILD_FLAGS="-Dgwt.compiler.localWorkers=..." Before this patch was merged, GWT compiler spawned up to: max_external_processes = localWorkers i.e. using separate Java sub-process (CompilePermsServer) that communicates with GWT compiler process via socket. For localWorkers == 1, tests show minimal-to-zero improvement. However, for localWorkers > 1, tests show a slight improvement in favor of thread-based approach. Let me know if you have any questions. Regards, Vojtech