olly 01c0ccbdbd Optimize ParsableBitArray
ParsableBitArray.readBit in particular was doing an excessive
amount of work. The new implementation is ~20% faster on desktop.

Issue: #3040

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=161666420
2017-07-12 18:27:08 +01:00
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2017-07-12 18:27:08 +01:00