WordPress ZIP size grew 20MB in 7.0 due to adding the vips library

[berislav.grgicak]

The WordPress zip size increased to 54.7MB in 7.0 beta from 24.8MB in 6.9.

Most of the size increase comes from the vips library wp-includes/js/dist/script-modules/vips/.
The worker.min.js file contains an inlined wasm that is 10mb and the script-modules/vips directory also includes a worker.min.js.map which is also 10mb.
Similarly, there is both a worker.js and a worker.min.js.

We should minimize the ZIP size increase to reduce the installation time on hosts and in Playground.

Slack discussion: ​https://wordpress.slack.com/archives/C02RQBWTW/p1772083012240729

[mukesh27]

Move into general component.

[knutsp]

I don't know if related, but I am not able to manually update to latest, stuck on unpacking. I have tried with no active plugins, with and without debug mode, no errors logged. Background updates for nightlies do work. Manually reverting to 6.9.1 works fine.

This is a cPanel shared hosting with "unlimited" disk space and 4GB virtual memory available.

I always test beta releases, and have never seen this. So I wonder if this has to do with the new size. Still investigating the issue, though.

Redacted Site Health info:
`
### wp-core ###

version: 7.0-beta1-61729
site_language: nb_NO
user_language: nb_NO
timezone: Europe/Oslo
multisite: false
blog_public: 0
dotorg_communication: true

### wp-active-theme ###

name: Twenty Twenty-Five (twentytwentyfive)
version: 1.4

### wp-server ###

server_architecture: Linux 5.14.0-611.16.1.el9_7.x86_64 x86_64
httpd_software: LiteSpeed
php_version: 8.5.2 64bit
php_sapi: litespeed
max_input_variables: 10000
time_limit: 180
memory_limit: 2G
max_input_time: 600
upload_max_filesize: 64M
php_post_max_size: 64M
curl_version: 8.14.1 OpenSSL/3.5.1
suhosin: false
imagick_availability: true
opcode_cache: true
opcode_cache_memory_usage: 237910072 of 268435456
opcode_cache_interned_strings_usage: 100% of 8388608 (0 free)
opcode_cache_hit_rate: 94.66
opcode_cache_full: false

### wp-constants ###

WP_MEMORY_LIMIT: 512M
WP_MAX_MEMORY_LIMIT: 768M
WP_DEBUG: true
WP_DEBUG_DISPLAY: false

### wp-filesystem ###

wordpress: writable
wp-content: writable
uploads: writable
plugins: writable
themes: writable
fonts: writable
mu-plugins: writable
`

[adamsilverstein]

The increase should be closer to 4mb. Looks like we are including map files and un minified files we really do t need for these wasm binaries.

[adamsilverstein]

I started work on this in ​https://github.com/WordPress/gutenberg/pull/75993

## Summary

• Skip .map source map files in copyDirectory() — sourceMappingURL references are already stripped from JS files by the existing removeSourceMaps transform, so the .map files serve no purpose in Core
• Skip non-minified VIPS JS files — they are ~10MB of inlined WASM binary data with no debugging value over the minified versions
• Saves ~30MB total from the build output

## Test plan

• [ ] Run node tools/gutenberg/copy-gutenberg-build.js and verify no .map files are copied
• [ ] Verify VIPS directory only contains minified files (worker.min.js, loader.min.js, asset PHP files)
• [ ] Verify other script module packages still have their expected files
• [ ] Confirm overall build size reduction (~30MB savings)

[adamsilverstein]

this one on the Gutenberg side is still in discussion: ​https://github.com/WordPress/gutenberg/pull/75993

@berislavgrgicak I worked on a wp core solution (just on the WordPress side). Can you confirm this fixes the issue on your end? ​https://github.com/WordPress/wordpress-develop/pull/11109. It excludes the extra files as it brings over Gutenberg during the build.

I couldn't figure out how to build a test zip so i'm looking at the build folder. is there a grunt command i am missing?

[berislav.grgicak]

I'm not sure how we build the final relese ZIP, so I tested it by running npm run build and zip -9 -r wordpress.zip build/. The trunk build is 76MB, and the build for this PR is 63MB.

This worked well in my testing, committing.

[adamsilverstein]

In 61794:

General: VIPS library omit un-minimized and .map files.

Omit these files which offer little value since the VIPS library is primarily inlined WASM. Saves ~30MB total from the build output.

Props swissspidy, westonruter, adamsilverstein, berislav.grgicak, knutsp.
Fixes: #64734.

Committed in r61794 (8db186734aeb5a72f1268b85f82ea772cde81bb2).

(Not sure why this PR wasn't closed automatically with the commit.)