Bye bye, fast compilation times

[Nick Sabalausky (Abscissa)]

On 02/06/2018 01:11 AM, Dmitry Olshansky wrote:
> On Tuesday, 6 February 2018 at 05:45:35 UTC, Steven Schveighoffer wrote:
>> On 2/6/18 12:35 AM, Dmitry Olshansky wrote:
>>>
>>> That’s really bad idea - isEmail is template so the burden of 
>>> freaking slow ctRegex
>>> is paid on per instantiation basis. Could be horrible with separate 
>>> compilation.
>>
>> Obviously it is horrible. On my mac, it took about 2.5 seconds to 
>> compile this one line.
>>
>> I'm not sure how to fix it though... I suppose you could make
> 
> Just use the run-time version, it’s not that much slower. But then again 
> static ipRegex = regex(...) will parse and build regex at CTFE.
> 
> Maybe lazy init?
> 

If the regex string isn't dependent on the template's params, just move 
the regex outside the template.