Deleting custom parameters when there is many of them is very slow

In this font deleting custom parameter takes several seconds, and it gets relatively faster as one deletes more custom parameters until it is snappy again when there is only a few of them.
Test2.glyphs (3.3 KB)

Not on m Mac now so can’t test with this particular file, but you can delete many parameters at once: select and press Cmd-Delete.

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We’ll have a look. Thanks.

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