[1.7>master] [MERGE #3472 @obastemur] JSON: allocate enough cache
[1.7>master] [MERGE #3472 @obastemur] JSON: allocate enough cache

Merge pull request #3472 from obastemur:fix_cache_count

Improves AcmeAir LTO ~1%

mrkmarron/ChakraCore,Microsoft/ChakraCore,mrkmarron/ChakraCore,mrkmarron/ChakraCore,Microsoft/ChakraCore,mrkmarron/ChakraCore,mrkmarron/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore,mrkmarron/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore,mrkmarron/ChakraCore