Javascript Bundling produces huge 13MB js files

[VegasJames]

Steps to reproduce

1. Install Magento via composer. v2.0.5
2. Use admin to enable Javascript Bundling. (Stores -> Configuration -> Advanced -> Developer -> JavaScript Settings) and set Merge JavaScript Files and Enable Javascript Bundling to Yes
3. Left "Minify JavaScript Files" to No so the file could be inspected, but even with it as Yes the bundle0.min.js files is 8MB.
4. Had to run bin/magento setup:di:compile
5. Then did bin/magento setup:static-content:deploy
6. Observe the size of the generated bundle0.js file.

Expected result

Before bundling Chrome showed about 515KB of javascript being loaded, bundling the files in to one should result in a file of a similar size, not 25 times as big.

Actual result
ls -lh pub/static/frontend/Magento/blank/en_US/js/bundle/
total 13M
-rw-rw-rw-. 1 magento apache 13M May 14 07:23 bundle0.js

I've investigated the content of the file somewhat. After a lot of valid javascript we get to this bit:
//# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJz (truncated)
This goes on and on with random characters for 1,414,372 bytes.
The rest of the file then appears to be valid javascript, so unfortunately the above base64 only explains about 10% of the bloat, so I'm not sure where the rest comes from, but certainly this seems wrong.

Additionally, this is more of a feature request, but can the bundling leave out jquery and jquery-ui?
These are the two largest files accounting for 700KB of javascript and almost 200KB of data transferred, and they also could be fetched from Google CDN instead:
https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js
https://ajax.googleapis.com/ajax/libs/jqueryui/1.10.4/jquery-ui.min.js

[pboisvert]

Chuck--can you get the team to investigate given the potential for performance impact if reproducible?

[rudik99]

I also suffered the same problem on the same version installed via composer.

[choukalos]

I'll check with the team re bundle size. I believe we implemented a very simple bundling algorithm so it's possible we're pulling in some additional files in the bundle.

Is anyone else seeing bundle.js errors on 2.0.5? @devdesco-ceo did you create a separate Github issue for the bundle error on 2.0.5?

[vkorotun]

@VegasJames It seems like your theme doesn't inherit from Blank or Luma Magento native themes, so exclude list for JS files bundling is missed. You need to configre the exclude list for your custom theme. As a reference example you can have a look into configuration for Blank or Luma theme:

• /app/design/frontend/Magento/blank/etc/view.xml
• /app/design/frontend/Magento/luma/etc/view.xml

See "exclude" node content.

[choukalos]

@VegasJames Please close or let us know if that didn't address your issue.
@devdesco-ceo What themes do you have installed?

[VegasJames]

incorrect, this is a stock Magento install. the bundle file inside both the
blank and Luma theme directories is 13MB

On Wednesday, May 18, 2016, Chuck Choukalos notifications@github.com
wrote:

@VegasJames https://github.com/VegasJames Please close or let us know
if that didn't address your issue.
@devdesco-ceo https://github.com/devdesco-ceo What themes do you have
installed?

—
You are receiving this because you were mentioned.
Reply to this email directly or view it on GitHub
#4506 (comment)

[TommyKolkman]

I can second VegasJames's problem on 2.0.7. Also, my theme inherits correctly.

[atIOCrON]

@vkorotun we have the same issue verified with Magento 2.0.6 using the default Luma theme:

Without JS Bundling (453.8kb): http://tools.pingdom.com/fpt/#!/czoIzm/https://new.betterbatt.com.au/
With JS Bundling (2.1mb): http://tools.pingdom.com/fpt/#!/c8CxvG/https://new.betterbatt.com.au/

As you can see JS Bundling increases page size by 4x.

I also noticed that JS Bundling when enabled blocks the selection of role resources when adding a custom admin role.