[fpc-devel] Patch to speed up Uppercase/Lowercase functions

[Florian Klaempfl]

L505 wrote:
> http://dennishomepage.gugs-cats.dk/LowerCaseChallenge.htm
> 
> LowerCaseShaPas2_c
> This one here is in Pascal, using GOTO and LABEL which consistently work fast on
> both -Og and -OG
> But no one wants to maintain a GOTO and a LABEL..
> 
> [LowerCaseShaPas2_c] was slightly slower than [lowercase 6 ] (second fastest)
> in -OG  mode
> [LowerCaseShaPas2_c] was slightly faster than [lowercase 9] (still second
> fastest)  in -Og  mode .. so it's more consistent across compiler options it
> seemed
> 
> So maybe [lowercase 6 ] result should be submitted to fastcode to be tested?
> 
> Also, if no one wants to use the assembly functions 

Asm is ok as well as long as there is also a good pascal implementation.

> and GOTO/LABEL functions in

I've no problem with goto/label as long as it affects only a litte part
of the rtl.

> the RTL due to code bloat/maintenance, we could always offer an optional unit
> where people could call the fast functions only if they needed them badly.
> Just like how fastcode does, external from the VCL.
> 
> ----- Original Message -----
> From: "Martin Schreiber" <fpmse at bluewin.ch>
> To: "FPC developers' list" <fpc-devel at lists.freepascal.org>
> Sent: Saturday, June 11, 2005 9:29 PM
> Subject: Re: [fpc-devel] Patch to speed up Uppercase/Lowercase functions
> 
> 
> On Sunday 12 June 2005 00.23, Jonas Maebe wrote:
> 
>>Try also with register variables on (-O???r), it will probably more
>>closely match Kylix' results then in case of the loop versions.
> 
> 
> Kylix:
> lowercase execution time: 336887
> lowercase 1 execution time: 380923
> lowercase 2 execution time: 375411
> lowercase 3 execution time: 369814
> lowercase 4 execution time: 320665
> lowercase 5 execution time: 300580
> lowercase 6 execution time: 219047
> lowercase 7 execution time: 356606
> lowercase 8 execution time: 249913
> lowercase 9 execution time: 252431
> 
> -OG1r
> lowercase   execution time: 465596
> lowercase 1 execution time: 378780
> lowercase 2 execution time: 389711
> lowercase 3 execution time: 375878
> lowercase 4 execution time: 225029
> lowercase 5 execution time: 228708
> lowercase 6 execution time: 158026
> lowercase 7 execution time: 264930
> lowercase 8 execution time: 182939
> lowercase 9 execution time: 165446
> 
> -OG2r
> lowercase   execution time: 471705
> lowercase 1 execution time: 378160
> lowercase 2 execution time: 388112
> lowercase 3 execution time: 395773
> lowercase 4 execution time: 227191
> lowercase 5 execution time: 227925
> lowercase 6 execution time: 156750
> lowercase 7 execution time: 258313
> lowercase 8 execution time: 181842
> lowercase 9 execution time: 165069
> 
> -Og1r
> lowercase   execution time: 464843
> lowercase 1 execution time: 486571
> lowercase 2 execution time: 463269
> lowercase 3 execution time: 472342
> lowercase 4 execution time: 247544
> lowercase 5 execution time: 399030
> lowercase 6 execution time: 646651
> lowercase 7 execution time: 263588
> lowercase 8 execution time: 636059
> lowercase 9 execution time: 170660
> 
> -Og2r
> lowercase   execution time: 470038
> lowercase 1 execution time: 487086
> lowercase 2 execution time: 459035
> lowercase 3 execution time: 476304
> lowercase 4 execution time: 243678
> lowercase 5 execution time: 399953
> lowercase 6 execution time: 646284
> lowercase 7 execution time: 265147
> lowercase 8 execution time: 632796
> lowercase 9 execution time: 169471
> 
> Martin
> 
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