It is not a rounding problem. The error gets increasingly longer at a rate of several seconds per hour.

This is on Windows 98. I don't see how it could be a granularity issue. The problem is that the error keeps accumulating.

Using your code, I was able to preproduce the problem: 

Core : 1081092725
HiRes: 1081092725.097

Core : 1081092785
HiRes: 1081092785.098

Core : 1081092849
HiRes: 1081092845.099

Core : 1081092908
HiRes: 1081092905.1

Core : 1081092968
HiRes: 1081092965.105

Core : 1081093029
HiRes: 1081093025.106

Core : 1081093088
HiRes: 1081093085.162

[download]
Here it shows a discrete jump of about 4 seconds. No idea why.

In reply to Re: Re: Time::HiRes::time() Bug on Cygwin by jdhedden
in thread Time::HiRes::time() Bug on Cygwin by jdhedden

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