Killing obsolete Jenkins builds

[Stephan Bergmann]

On 11/18/2015 03:28 PM, Ashod Nakashian wrote:
> As an aside, the recent drop in average build times (visible from the
> Jenkins build times list/graph) is something I like to believe is my
> fault :) The relevant commits were pushed on Sunday last and now there
> are far more sub 1h builds and the peaks for longer builds are shorter.
> I like to reduce that average even further by avoiding wasting the
> machine cycles on irrelevant work.

As far as I understand, Jenkins builds for gerrit changes are not 
complete rebuilds, but are done as incremental builds on top of what 
previous builds (of typically unrelated gerrit changes) happened to 
leave behind.  That likely makes analysing such build times hard.