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Date: Tue, 18 Aug 2015 07:38:21 +0800
From: Lei Zhang <>
Subject: Re: Formats using non-SIMD SHA2 implementations

On Aug 17, 2015, at 10:28 PM, Solar Designer <> wrote:
> Lei,
> On Mon, Aug 17, 2015 at 10:11:40PM +0800, Lei Zhang wrote:
>> To make it work with OpenMP, I move this array to global scope, and make it large enough (dynamic allocated) to be shared by multi-threads. However, I noticed a minor degradation in performance after this change, from ~41 c/s to ~39 c/s for a non-OpenMP build. This change is not huge, but can be observed consistently.
> The above is unclear: have you increased the size of the array (along
> with switching to dynamic allocation) even in non-OpenMP builds?  Or has
> the size remained the same, yet performance degraded?

For a non-OpenMP build, the size of the array remains the same; the only change is switching from static to dynamic allocation. Yet this minor degradation is observed.


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