Author: Uri Blass
Date: 06:48:13 02/26/03
Go up one level in this thread
On February 26, 2003 at 08:45:30, Pat King wrote:
>On February 25, 2003 at 12:40:18, Uri Blass wrote:
>
>>On February 25, 2003 at 12:31:14, Pat King wrote:
>[prior to this Uri and Pat wrote a lot of stuff]
>>>>
>>>>data.h is varaibles when defs.h is definition.
>>>>I learned it from tscp.
>>>>
>>>>some varaibles are dependent on definition so I need to include defs.h first
>>>
>>>I would submit that this is a bad feature of tscp.
>>
>>so what do you think?
>>
>>Do you suggest to include all the definitions and the external varaibles in the
>>same file?
>>
>>I do not see why it is a problem except the error that I reported and finding
>>and fixing the error took me only few minutes.
>>
>I haven't looked at tscp or at your code, but you seem to be saying that you're
>declaring a bunch of variables as extern in a header, with the actual
>declaration hidden somewhere in the source.
It is hidden in the file data.c
If I change a varaible I need to change both data.h and data.c
This can be a maintenance problem
>because you must remember to change both files.
I do not think that it is significant problem because the time that
I spend on changing names of varaibles is very small relative to the time that I
spend about thinking and changing other things.
I try to do changes that do my program simpler and faster but I can say that I
am disapponted from the speed result of the last change.
The change that I did was simply to change my loops by using the break command.
I have a lot of loops of the following 2 types(I have different varaibles)
Type 1:
do
{
...=...//do not change the condition but I do not know if I can use
this fact to do the program faster
if condition
x=a[x];
else
x=-1
}
While (x!=-1)
Type 2:
while (x>=0)
{
...=...//again do not change the condition
if (condition)
x-=8;
else
x=-1;
}
}
In part of the cases the condition is more complicated then if (x!=-1) but x=-1
is enough to make the condition false.
I change it to else break.
I hoped to see some small speed improvement but unfortunately
I did not see it
I saw a small speed improvement after part of the changes but it was gone
after I completed the change.
It may be a compiler random error but I wonder if break has a price in speed
and if there are better way to get out of a loop.
Uri
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