[Swift-devel] log plots of start/end times

[Ben Clifford]

Something else I find interesting in those plots is how maybe 300 jobs run 
really fast, then there's a suddent jump in the curve, and after that the 
curve is fairly smooth. That can be seen both on 'info duration histogram' 
and on 'how wrapper.sh is spending its time'. Not sure what causes that. 
Initially I'd guess something related to fielsystem load.

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