<p></p>
<p>Geany is designed for editing human files, not machine minimised files.  Many things happen per line, and its more than proportional to the line size.</p>
<p>You should be able to open the file fairly quickly if you open it as filetype <code>none</code> and wrapping off, but otherwise it will be slow, especially with very long lines because the code is optimised for short lines.</p>
<p>The problem with warning about lines too long is, what is too long?  The answer is likely to be different for a Raspberry Pi and an i9 9900k workstation.  Also it would require scanning the file to determine line length further slowing <em>all</em> file loads.</p>

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