EmEditor not responsive when handling long lines

Question

I am processing text files with very long lines, like 1M characters, EmEditor doesn't handle it well.

Create a new HTML file, insert

<a href="http://google.com">Google</a>

then duplicate it while keeping it to a single line and duplicate a few times so that you can get a line with several millions of characters.

Now any use of arrow keys to move the cursor, dragging the horizontal scroll bar, clicking the mouse to change the position of the caret will make EmEditor freeze for a few seconds.

Is there any program setting to accelerate?

Answer 1

Please update to the latest version of EmEditor, and select No Wrap on the View menu. You might also need to save the file first, and then reload the file.

If these don't help, you can disable highlight by selecting the Text configuration, and/or you can go to the Optimization page of the Customize dialog box, and select less than 10,000,000 for the Do not highlight if line length exceeds slider.

If you are working on HTML/CSS/JSON/XML files, you might also want to disable the syntax checker by selecting (None) for the Syntax Checker Engine in the Syntax Check page of the Customize dialog box.

You might also want to disable the Highlight Matching Tag and Highlight Matching Brackets options in Highlight (2) page of HTML configuration properties.