Premailer performance with compressed/minified CSS files

[jpbarbosa]

Hi,

Some weeks ago I started having performance problems in my production environment (Heroku) when sending emails with premailer - even using delayed job. Under development environment everything was running fine. My CSS is big, with Bootstrap inside it, and yes, I'm using Bootstrap to add some styles to my email messages.

I started debugging it and, after several tests, I was able to fix the problem using a non-compressed version of my application.css to send emails. This new file, called application-non-compressed.css has the same number of selectors then the original one, the only difference is that the non-compressed version was generate with "config.assets.compress = false" and was not minified.

Heroku delayed job / worker log:

• Compressed CSS: Class#deliver completed after 194.4798
• Non-Compressed CSS: Class#deliver completed after 5.2357

Is there any issue with premailer and big compressed CSS files?

Thanks.

[akzhan]

Interesting. But actually you need to create issue at premailer/css_parser project.

[jpbarbosa]

Okay, Thanks!

premailer/css_parser#50