Why Avoid array indexing. Use pointers. - 未名空间MITBBS历史存档

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Why Avoid array indexing. Use pointers.

Why Avoid array indexing. Use pointers.# Programming - 葵花宝典

e*d2007-10-29 07:10

1 楼

Code optimization 有这么一条 Avoid array indexing， Use pointers. 为什么呢？不需要再算地址了？
还有 Use int (natural word-size of the processor) to store flags rather than char or short。就因为alignment?

g*g2007-10-29 07:10

2 楼

I would say leave these stuff to smart compiler,
clean and readable code is more important in 99.9% of case.

？不需要再算地址了？
than char or short。就因为alignment?

【在 e******d 的大作中提到】

: Code optimization 有这么一条 Avoid array indexing， Use pointers. 为什么呢？不需要再算地址了？
: 还有 Use int (natural word-size of the processor) to store flags rather than char or short。就因为alignment?

t*t2007-10-29 07:10

3 楼

context: <

>

【在 g*****g 的大作中提到】
: I would say leave these stuff to smart compiler,
: clean and readable code is more important in 99.9% of case.
: 
: ？不需要再算地址了？
: than char or short。就因为alignment?

g*g2007-10-29 07:10

4 楼

That's exactly my point, this level of optimization should be done
by compiler. In code optimization context, it's about the 80-20 rule,
find out the bottleneck, use the better algorithm if there's any,
cut the redudant code, move out what doesn't have to be in loop.
99.9% cases these are more than enough. And in case they are not,
those little dirty tricks are not good enough to help either.

【在 t****t 的大作中提到】

: context: <>