Skip to main content

New Benchmarking Features and a New Homepage Design

Today I updated the benchmarking tool in Regex Hero with some new functionality.

There were essentially two things I was looking to accomplish:
  1. Create insight into the benchmarking tool so that developers know exactly what it's doing.
  2. Add the ability to benchmark your regular expression with the IsMatch() function.  IsMatch() simply returns true if your regular expression has even 1 match in the specified string.  As such, it actually stops searching after the first match is found.  In some cases this makes it many times faster than iterating through every match.
So now you'll see some new options to take care of all this...

You can click the Show/Hide benchmarking code button at any point if you want to know exactly what Regex Hero is going to do under every benchmarking loop.  There are effectively 4 different benchmarking modes: 2 modes when the Match tab is selected, 1 mode for Replace, and 1 mode for Split.

Homepage Redesign

And of course I've redesigned the homepage.  It's not too drastic of a departure from the old design.  One problem I wanted to solve was that the Regex Hero character used to point to the big "Regex Hero" title at the top of the page as you see here...

The problem with this was that the Regex Hero title at the top is actually a link back to the homepage.  So if you click it, all you'll see is the page reload.  And I found through Google Analytics there were a good number of people clicking this link from the homepage, suggesting that maybe the chubby pointing finger was influencing where people clicked.

So the new design takes this idea and uses it to point to where you should actually click...


Popular posts from this blog

Regex Hero for Windows 10 is Underway

Awhile back I began working on an HTML5 / JavaScript version of Regex Hero . However, it was a huge undertaking essentially requiring a complete rewrite of the entire application. I have not had enough time to dedicate to this lately. So I've begun again, this time rewriting Regex Hero to work in WPF. It'll be usable in Windows 10 and downloadable from the Microsoft Store. This is a much easier task that also has the advantage of running the .NET regex library from the application itself. This will allow for the same speedy experience of testing your regular expressions and getting instant feedback that Regex Hero users have always enjoyed. I expect the first release to be ready in Q4 of 2019.

Optimizing Your Regular Expressions

Regular expressions will backtrack.  That's an unfortunate thing about them because backtracking can be slow.    And in certain (rare) cases the performance can become so awful that executing the regular expression against a relatively short string could take over a minute.  There's a good article about catastrophic backtracking over at . And today I created a video about all of this called  Regex Lesson 5: Optimization .  In the video I start with a very poorly written regular expression and make several improvements to it, using the benchmarking feature along the way.  By the end of the video I make the regular expression over 3 million times faster. In addition, today's update to Regex Hero provides a little message in the event that you encounter a regular expression that takes over 10 seconds to evaluate... And then last of all, I changed the benchmarking feature a bit.  In the past it would simply test your regular expression against

Regex Analysis Bug Fixes

All of these updates relate to the analyzer, so if you're not a Regex Hero Professional user, then this won't affect you. I received a report of an analysis bug  related to character classes.  The regex analyzer wouldn't handle opening brackets inside a character class properly. It's one of the finer details of the regular expression syntax.  You wouldn't think that [[abc] would be valid, but it is.  You don't have to escape the opening bracket inside the character class.  So now the analyzer interprets this as it should. I've also fixed bugs around interpreting the \x00 (hex), \u0000 (unicode), and \k<group>  (backreference) expressions. P.S. The major updates I mentioned recently are still in the works.  So the price for Regex Hero Professional is still $20 for now.