precompile slow

[acesuares]

Dear,

Lately, precompiling assets is terribly slow. I can't put my finger on it. I am using rails 3.2.21 and the latest gem.

Precompiling in development is fast! But in production slow.

When I precompile locally - that is to say, the precompile is local but the RAILS_ENV is production, it is also terribly slow.

Precompiling in production takes more then 20 minutes.
In application.js I have
/= require 'ckeditor/init'

Any ideas?\

[acesuares]

executing "cd -- /var/www/ror/BooksBackend/releases/20150615172438 && RAILS_ENV=production RAILS_GROUPS=assets bundle exec rake assets:precompile" servers: ["ror.suares.com"] [ror.suares.com] executing command command finished in 685449ms

[kyledecot]

I'm having the same issue #573

[acesuares]

with
config.assets.compress = false
config.assets.compile = false
config.assets.digest = false

-> command finished in 20.084ms

config.assets.compress = true
config.assets.compile = false
config.assets.digest = false

-> command finished in 344.198ms

config.assets.compress = false
config.assets.compile = false
config.assets.digest = true

-> command finished in 37.712ms

[acesuares]

I switched to https://github.com/tsechingho/ckeditor-rails but had the same slow precompile times in production, and on top of that, ckeditor works in development but not in produdction.

#573
#579

[acesuares]

#579 is now solved, but precompile is still extremely slow.

[MarcusSky]

@acesuares I think I've found the solution.
I'm assuming you're using Uglifier in production

The problem is that the CKEditor source code (also jquery and others) are already minified. So when you deploy it to Heroku, it tries to minify the already minified files, thus taking a long time.
Referencing issue: mishoo/UglifyJS#321

My solution:

# production.rb 
config.assets.js_compressor = Uglifier.new(compress: { unused: false })

References:

• https://github.com/lautis/uglifier/blob/master/lib/uglifier.rb#L58
• Very slow processing for minified files mishoo/UglifyJS#321 (comment)

Let me know if that helps!

[edudepetris]

@MarcusSky I have the same problem that @acesuares and I tried your solution.
This works for me!. I reduce the precompilation time from 392.86s to 75.95s

Thanks!

[hernanvicente]

@MarcusSky Your solution works like a charm, thanks for sharing!

[tkaboris]

I copied uglifer gem into production group and changed production.rb
config.assets.js_compressor = Uglifier.new(compress: { unused: false })
But i get error on precompile
Error
at new JS_Parse_Error (/tmp/execjs20151226-10957-1dmxsmqjs:2659:11936)
at js_error (/tmp/execjs20151226-10957-1dmxsmqjs:2659:12155)
at croak (/tmp/execjs20151226-10957-1dmxsmqjs:2659:20622)
at token_error (/tmp/execjs20151226-10957-1dmxsmqjs:2659:20759)
at expect_token (/tmp/execjs20151226-10957-1dmxsmqjs:2659:20982)
at expect (/tmp/execjs20151226-10957-1dmxsmqjs:2659:21120)
at expr_list (/tmp/execjs20151226-10957-1dmxsmqjs:2659:29289)
at /tmp/execjs20151226-10957-1dmxsmqjs:2659:29559
at /tmp/execjs20151226-10957-1dmxsmqjs:2659:21493
at expr_atom (/tmp/execjs20151226-10957-1dmxsmqjs:2659:28836)new JS_Parse_Error ((execjs):2659:11936)
js_error ((execjs):2659:12155)
croak ((execjs):2659:20622)
token_error ((execjs):2659:20759)
expect_token ((execjs):2659:20982)

[edudepetris]

@tkaboris did you put require 'uglifier' in top of production.rb ?

[acesuares]

This hasn't worked for me, but I need to investigate further.

[acesuares]

Can be closed.