Revise the units of measure for perf stats
Revise the units of measure for perf stats

Summary: Report perf stats in terms of kb, mb, and gb instead of words.

Reviewed By: jvillard

Differential Revision: D3321108

fbshipit-source-id: 3ba18be

blzq/infer,ropas/infer,ropas/infer,jvillard/infer,jsachs/infer,xennygrimmato/infer,ryoon/infer,ryoon/infer,jvillard/infer,blzq/infer,facebook/infer,xennygrimmato/infer,kageiit/infer,ryoon/infer,blzq/infer,ropas/infer,kageiit/infer,ropas/infer,facebook/infer,jsachs/infer,blzq/infer,blzq/infer,xennygrimmato/infer,ryoon/infer,facebook/infer,kageiit/infer,xennygrimmato/infer,jvillard/infer,jvillard/infer,facebook/infer,jsachs/infer,ryoon/infer,jvillard/infer,kageiit/infer,ropas/infer,facebook/infer,xennygrimmato/infer,xennygrimmato/infer,jvillard/infer,kageiit/infer,ropas/infer,facebook/infer,kageiit/infer,xennygrimmato/infer,jsachs/infer,kageiit/infer,blzq/infer,jvillard/infer,jsachs/infer,jsachs/infer,facebook/infer,ryoon/infer