Re: [PATCH 2/2] xdiff: optimize xdl_hash_record_verbatim

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> On Mon, 11 Aug 2025, Phillip Wood wrote:
> 
> > > That's what the 'cycles' column in the table gives (6.21/5.8 = 1.070...)
> > 
> > It would be helpful to add a column with those calculations in it rather than
> > forcing the reader to calculate the speed up for themselves.
> 
> Ok, will change it to
> 
> version | speedup over (A) | cycles, bn | instructions, bn
> ----------------------------------------------------------
> A                            6.38         11.3
> B         1.027              6.21         10.89
> C         1.1                5.80          9.95
> D         1.094              5.83          8.74
> ----------------------------------------------------------

On my Skylake:

version | speedup over (A) | cycles, bn | instructions, bn
----------------------------------------------------------
A                            5.77         10.96
B         1.076              5.36         10.60
C         1.12               5.16          9.66
----------------------------------------------------------

A is today's master, B and C are patch 1 and 1+2 like before.

Alexander




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