Jamie Liu 8b15effd9e Improve syserror_test. ...

- It's very difficult to prevent returnErrnoAsError and returnError from being
  optimized out. Instead, replace BenchmarkReturn* with BenchmarkAssign*, which
  store to globalError.

- Compare to a non-nil globalError in BenchmarkCompare* and BenchmarkSwitch*.

New results:
BenchmarkAssignErrno
BenchmarkAssignErrno-12     	1000000000	         0.615 ns/op
BenchmarkAssignError
BenchmarkAssignError-12     	1000000000	         0.626 ns/op
BenchmarkCompareErrno
BenchmarkCompareErrno-12    	1000000000	         0.522 ns/op
BenchmarkCompareError
BenchmarkCompareError-12    	1000000000	         3.54 ns/op
BenchmarkSwitchErrno
BenchmarkSwitchErrno-12     	1000000000	         1.45 ns/op
BenchmarkSwitchError
BenchmarkSwitchError-12     	536315757	        10.9 ns/op

PiperOrigin-RevId: 331875387

2020-09-15 15:59:25 -07:00

..

BUILD

Standardize on tools directory.

2020-01-27 12:21:00 -08:00

syserror_test.go

Improve syserror_test.

2020-09-15 15:59:25 -07:00

syserror.go

Move ERESTART* error definitions to syserror package.

2020-08-18 19:28:53 -07:00