EmEditor Professional 7.00 beta 26 makes some progress in speed.
But Regex replace for big file is still slow.
Comparing with UltraEdit,you will find making same Regex replace UltraEdit is very rapid.
Example:
http://rapidshare.com/files/66852099/slowReplace.zip.html
Regex replace”.+?“.
It takes EmEditor several minutes.
It takes UltraEdit less than one second,almost instantaneously.