One thing that can take a lot of time is building Font database.

There seems to be a "bug" in Lilypond on Windows so that the font database is created every time!

A workaround is to delete the directory

%homepath%\ .lilypond-fonts.cache-2

The first time you Engrave it create the font database, but the next time it's already done...

NB! If you're using multiple versions of Lilypond you need to do this every time you change version:

// Anders

On 2017-02-15 15:38, Peter Toye wrote:
Re: Lilypond hogging a processor and slowing down Phil,

You're right - I should have said.

Windows 7. LP 2.19.52

Best regards,

Peter <>

Wednesday, February 15, 2017, 1:15:38 PM, you wrote:

        Lilypond version?  Operating system?

Phil Holmes

----- Original Message -----
*From: *Peter Toye <>
*To: * <>
*Sent:* Wednesday, February 15, 2017 12:50 PM
*Subject:* Lilypond hogging a processor and slowing down

In the last few days LP has slowed right down when using Frescobaldi - engraving a one-bar snippet took 25 seconds! And it was completely hogging one processor - 24.9% utilisation on a 4-processor machine.

The only thing that I can think of is that inadvertently I double-clicked on the LP icon rather than the Frescobaldi one at some stage before the slowup happened, but that just produced the standard test file output.

I've tried uninstalling and re-installing LP, but that didn't change anything.

Any ideas?

Peter <>
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