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    Resolution: Unresolved
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It is very useful to see what parts of build take time. This format allows to build a flamegraph of commands that tool executes and display that to the user.
https://docs.google.com/document/d/1CvAClvFfyA5R-PhYUmn5OOQtYMH4h6I0nSsKchNAySU/preview
https://github.com/nico/ninjatracing
https://www.chromium.org/developers/how-tos/trace-event-profiling-tool/