Parallelizing DelInit
Parallelizing DelInit

Summary:
This makes it faster, while keeping the exact same behavior.

Ignore the Lint errors. They come from areas not actually affected by this change, and not adjusting all formatting makes it easier to assess the actual changes.

Reviewed By: thezhangwei

Differential Revision: D15422511

fbshipit-source-id: 0a261a069a3d5444f8996eb8919aab5ad95adc28

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