I like the new status bar thing that mach has. It would be nice if we showed elapsed build time there as well as an estimated time to completion. I was thinking for the estimate we could put in some checkpoints and then compare our own elapsed time to some reference build.
Bug 873720 was only the tip of the feature. The annotating markers in the build output now allow us to record times of individual build phases. I have plans to record this information to enable plotting of resource usage, estimated time of completion, etc. Estimated time for completion will always be difficult to get right (so many things that can throw it off - like ccache). But, we should be able to print elapsed time in the footer easily enough. Although, we currently get that prefixed with every log line.
Depends on: 873720
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