unable to skip warmup builds despite --warmups=0

[wisechengyi]

No description provided.

[oehme]

Could you elaborate what use case you have for 0 warmups?

[wisechengyi]

Sure! In a separate thread, we were trying to figure out what the performance issue is for gradle after git clean -fdx in the android repo. The issue only occurs on the first run, because the second run will be all up to date. In this case, having 'clean' task as the clean up task does not work because ./gradlew clean isn't the same as git clean -fdx

It does make sense to me that warmups has a non zero default value, but since it is an option, specifying --warmups=0 should work as expected as well.

[oehme]

I remember the problem you were looking for was in buildSrc. The Gradle profiler will already start up Gradle to determine what version you are running on and what extra JVM args your build specifies. So buildSrc will already be warmed up, even before the first "warmup run".

I think for analysing this special case, you might want to add the agentpath for JProfiler/YourKit to the Gradle JVM args by hand and profile "the old fashioned way". The Gradle profiler isn't really suited for this kind of "first use" analysis at the moment.

[wisechengyi]

I understand. Although my second point should be still valid, i.e. it makes sense for warmup to have non zero default, but there is no need to force warmup runs, and --warmups=0should not surprise people.

[charlesritchea]

@oehme My use case is simple. My build takes a long time (long running e2e test), so I don't want to run it more than once.