[cmake-developers] slow regex implementation in RegularExpression

[Alexandru Ciobanu]

Hi Bill and Pau,

I am currently working on adding PCRE to CMake. Chances are very hight that it will work, given the very similar comp()/exec() API calls in both implementations.

I'll let you know about the results soon.

Alex


On 2011-11-14, at 10:31 PM, Bill Hoffman wrote:

> On 11/14/2011 6:08 PM, Pau Garcia i Quiles wrote:
>> Bill,
>> 
>> I think the current incarnation of regexps in CMake should be kept for
>> compatibility reasons.
>> 
> Yes, of course.
> 
>> Adding PCRE is not difficult, just time consuming. The implementation
>> I'd do would be an additional abstraction layer:
>> - For the current BRE implementation, it would be a 1:1 call match
>> - For the PCRE implementation, it would keep match status, count,
>> next/previous iterators, etc.
>> 
> So, for this case I would be interested to here from Alex to see if swapping out the regex will fix the ctest performance issue.  It is a nice isolated place to give PCRE a try.
> 
> -Bill
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