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KevinH · 04-07-2021, 02:27 PM

Assuming this is with the exact same epub, nothing much related to speed has really changed between those two versions. And in fact 1.5.1 is, if anything, just a bit faster.

My guess is you have a anti-virus program that is set to scan every file created in tmp and it sees Sigil-1.4.3 as safe and Sigil-1.5.1 as unsafe and is scanning every file is opens or tries to load which hugely slows down Sigil.

If there is some way of telling your anti-virus program that Sigil-1.5.1 is safe and should be left alone, you could try that.

Better yet, as a test disconnect your computer from the internet briefly and reboot with any added anti-virus disabled, and the do the speed test. You should see that for the exact same epub, Sigil-1.5.1 is slightly faster.

04-07-2021, 02:27 PM	#2
KevinH Sigil Developer Posts: 9,071 Karma: 6361556 Join Date: Nov 2009 Device: many	Assuming this is with the exact same epub, nothing much related to speed has really changed between those two versions. And in fact 1.5.1 is, if anything, just a bit faster. My guess is you have a anti-virus program that is set to scan every file created in tmp and it sees Sigil-1.4.3 as safe and Sigil-1.5.1 as unsafe and is scanning every file is opens or tries to load which hugely slows down Sigil. If there is some way of telling your anti-virus program that Sigil-1.5.1 is safe and should be left alone, you could try that. Better yet, as a test disconnect your computer from the internet briefly and reboot with any added anti-virus disabled, and the do the speed test. You should see that for the exact same epub, Sigil-1.5.1 is slightly faster. Last edited by KevinH; 04-07-2021 at 02:30 PM.