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

[Yury Sidorov]

> Borland's compiler does register variables better than FPC and can do
> induction variables. This has a large impact on the code generation in
> general.

|>I thought I saw that FPC beat Kylix in several cases in the timings
|>that were posted.

> I saw this too, so what do you mean Daniël .. in the -Og cases?

FPC is beating Delphi 5 in my tests:

FPC with -OG3r:

Lowercase2 Time to execute: 00:00:00.828
Lowercase3 Time to execute: 00:00:00.876
Lowercase4 Time to execute: 00:00:00.593
Lowercase41 Time to execute: 00:00:00.547
Lowercase42 Time to execute: 00:00:00.548
Lowercase5 Time to execute: 00:00:00.625
Lowercase6 Time to execute: 00:00:00.641

Delphi 5 with full optimization:

Lowercase2 Time to execute: 00:00:00.859
Lowercase3 Time to execute: 00:00:00.953
Lowercase4 Time to execute: 00:00:00.735
Lowercase41 Time to execute: 00:00:00.671
Lowercase42 Time to execute: 00:00:00.469
Lowercase5 Time to execute: 00:00:00.516
Lowercase6 Time to execute: 00:00:00.640

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Yury Sidorov, jura at blagovest.com