Avoid unnecessary boxing/unboxing.
Avoid unnecessary boxing/unboxing.

Summary: Boxing/unboxing to parse a primitive int is unnecessary.

Test Plan: CI

Reviewed By: jtorkkola

fbshipit-source-id: 43e001a

brettwooldridge/buck,JoelMarcey/buck,kageiit/buck,Addepar/buck,kageiit/buck,kageiit/buck,shs96c/buck,zpao/buck,romanoid/buck,SeleniumHQ/buck,Addepar/buck,romanoid/buck,shs96c/buck,JoelMarcey/buck,ilya-klyuchnikov/buck,LegNeato/buck,SeleniumHQ/buck,facebook/buck,Addepar/buck,LegNeato/buck,JoelMarcey/buck,clonetwin26/buck,JoelMarcey/buck,rmaz/buck,SeleniumHQ/buck,romanoid/buck,ilya-klyuchnikov/buck,ilya-klyuchnikov/buck,zpao/buck,LegNeato/buck,brettwooldridge/buck,shs96c/buck,brettwooldridge/buck,rmaz/buck,shs96c/buck,kageiit/buck,clonetwin26/buck,ilya-klyuchnikov/buck,brettwooldridge/buck,romanoid/buck,rmaz/buck,LegNeato/buck,Addepar/buck,rmaz/buck,JoelMarcey/buck,nguyentruongtho/buck,brettwooldridge/buck,romanoid/buck,LegNeato/buck,clonetwin26/buck,ilya-klyuchnikov/buck,zpao/buck,facebook/buck,SeleniumHQ/buck,kageiit/buck,romanoid/buck,zpao/buck,brettwooldridge/buck,clonetwin26/buck,LegNeato/buck,facebook/buck,shs96c/buck,shs96c/buck,SeleniumHQ/buck,SeleniumHQ/buck,Addepar/buck,shs96c/buck,clonetwin26/buck,LegNeato/buck,brettwooldridge/buck,Addepar/buck,Addepar/buck,clonetwin26/buck,Addepar/buck,brettwooldridge/buck,ilya-klyuchnikov/buck,rmaz/buck,romanoid/buck,shs96c/buck,nguyentruongtho/buck,ilya-klyuchnikov/buck,romanoid/buck,kageiit/buck,shs96c/buck,nguyentruongtho/buck,ilya-klyuchnikov/buck,clonetwin26/buck,romanoid/buck,facebook/buck,ilya-klyuchnikov/buck,Addepar/buck,JoelMarcey/buck,facebook/buck,rmaz/buck,Addepar/buck,rmaz/buck,nguyentruongtho/buck,rmaz/buck,Addepar/buck,rmaz/buck,JoelMarcey/buck,ilya-klyuchnikov/buck,romanoid/buck,clonetwin26/buck,zpao/buck,JoelMarcey/buck,JoelMarcey/buck,SeleniumHQ/buck,rmaz/buck,brettwooldridge/buck,shs96c/buck,LegNeato/buck,SeleniumHQ/buck,JoelMarcey/buck,romanoid/buck,LegNeato/buck,LegNeato/buck,clonetwin26/buck,romanoid/buck,clonetwin26/buck,SeleniumHQ/buck,nguyentruongtho/buck,Addepar/buck,clonetwin26/buck,nguyentruongtho/buck,brettwooldridge/buck,brettwooldridge/buck,SeleniumHQ/buck,LegNeato/buck,shs96c/buck,rmaz/buck,brettwooldridge/buck,brettwooldridge/buck,ilya-klyuchnikov/buck,JoelMarcey/buck,Addepar/buck,JoelMarcey/buck,kageiit/buck,rmaz/buck,shs96c/buck,SeleniumHQ/buck,facebook/buck,facebook/buck,nguyentruongtho/buck,JoelMarcey/buck,shs96c/buck,ilya-klyuchnikov/buck,SeleniumHQ/buck,clonetwin26/buck,ilya-klyuchnikov/buck,LegNeato/buck,romanoid/buck,SeleniumHQ/buck,LegNeato/buck,zpao/buck,clonetwin26/buck,zpao/buck,rmaz/buck