tree 24abf96b94e467bdca28f2130686480ab07a7a57
parent b0c26f18687fcd4268640aa6076fcf380c7a3086
author Herbie Ong <herbie@google.com> 1578446803 -0800
committer Herbie Ong <herbie@google.com> 1578509083 +0000

internal/encoding/json: fix performance cliff when decoding large integers that will go out of range.

For large positive integers, add check for number of decimal digits
before converting number to plain integer w/o exponent.

If exponent value is large, previous implementation may end up
constructing a large string with lots of zeroes that is not useful as it
will fail later on when called with strconv.Parse{Uint,Int} anyways.

Fixes golang/protobuf#1002.

Change-Id: I65bfad304401e076743853d7501786b7231b083b
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/213717
Reviewed-by: Damien Neil <dneil@google.com>