1 file runs really slow but other files work fine. Why is my file lagging?

[danham22]

I have 1 file that just lags really bad but when I open any other file they work great. 

Ive tried deleting all the clutter and only having a few objects but it still runs slow.

Particularly when drilling down into groups it stops and i get a loading wheel for a few seconds.

The file size is small 12.1mb

I got rid of all images and its just objects.

Why is my file so slow?

[michelew83603738]

I can't say why that has happened, are you using a font? What you can try and has worked for me in the past is that I copy everything into a new file and go from there and that sometimes works.

[danham22]

No fonts, I did try to copy it into a new file, and it still persists.

[ceyhun_akgun]

The reasons may be too many. There may be no fixed cause.

1- Can cause PostScript features.

2- Is there an embedded file? (Tiff, PSD, JPEG)

3- There may be hundreds of paths created with MESH features or BLEND and then resolved.

4- There may be an effect in the Appearance panel. It may be performing RENDER operation each time.

5- Problem fonts.

[danham22]

1- What is Postscript features?

2. No embedded or linked images

3. I have 1 mesh but i deleted it and didnt fix it

4. I have no effects applied

5. no fonts at all

[Ton Frederiks · Accepted solution]

To find out what is causing the slowdown, you can delete parts of the artwork and turn Preview on and off to see if there is a change.

The background of this part is causing the slowness.

Try to simplify it to a single black object.

[danham22]

Thats a good idea to isolate each part and delete it and test it. I had tried that on some of the parts but didnt try it all.

Thanks!

[Kurt Gold]

It is not only the background of the bearded creature that is causing slowness in this case.

The whole composition/construction has way too many unnecessary anchor points and should be cleaned up.