NewLC - How to optimize code on Symbian? - Comments

Re: How to optimize code on Symbian?

joker_pl — Tue, 21 Jun 2005 12:35:37 +0200

counting from 0 to 255 looks like:

Code:

MOV R1, #0
.myloop
ADD R1, R1, #1
CMP R1, #255
BNE myloop

and counting from 255 to 0 looks like

Code:

MOV R1, #255
.myloop
SUBS R1, R1, #1
BNE myloop

check this site its good source for someone new with ARM.

Re: How to optimize code on Symbian?

Guest — Tue, 21 Jun 2005 01:20:15 +0200

What do you mean by doing a for loop backwards? How does this increase efficiency?

How to optimize code on Symbian?

joker_pl — Tue, 26 Apr 2005 23:00:39 +0200

Quote from: MirekCz

1.check exactly which functions work slow and optimize them

2.try to optimize algorythm first

3.don't use floating point math, use 32bit memory accesses, don't use div and limit using mul etc etc... dozens of optimization tricks come to my mind, it depends what you're doing

Yep i agree. There are many things that can speed up your code.
Some are difficult some are realy easy like for ex. doing for-loops backward.
It realy depends what app your doing.
Check tutorials bout C++ optimization, try some ARM assembly.[/b]

How to optimize code on Symbian?

MirekCz — Tue, 26 Apr 2005 20:07:56 +0200

How to optimize code on Symbian?

joker_pl — Mon, 25 Apr 2005 11:34:06 +0200

if you use STDLIB your code will work slower.

How to optimize code on Symbian?

didster — Mon, 25 Apr 2005 10:25:44 +0200

Simple, write it better .

C/C++ is fast enough for most things on Symbian, very few things actually need to be assembly optomized.

How to optimize code on Symbian?

fs1028 — Mon, 25 Apr 2005 04:27:27 +0200