Image Optimizer - Compress, Resize and Optimize Images 1.6.8

Does "Image Optimizer - Compress, Resize and Optimize Images" work with WordPress 6.8.3 and PHP 8.1.12? A smoke test was performed on .

Summary

Errors
10Unrecognized messages in the PHP error log
No JavaScript exceptions
All test pages loaded successfully
No resource errors
Performance

Memory usage: 352.2 KiB
The average PHP memory usage increased by this amount after activating by the plugin.

Page speed impact: insignificant.
The plugin didn't make the site noticeably slower.

Environment
WordPress version6.8.3
PHP version8.1.12
MySQL version10.6.10
PHP memory limit512M
Plugin Info
Last updated
Active installs 1,000,000+
WordPress.org page https://wordpress.org/plugins/image-optimization/
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Pages 5

Plugins ‹ Test site — WordPress

Page screenshot: Plugins ‹ Test site — WordPress
URL /wp-admin/plugins.php?plugin_status=all&paged=1&s
Requested URL /wp-admin/plugins.php?action=activate&plugin=image-optimization%2Fimage-optimization.php&plugin_status=all&paged=1&s&_wpnonce=188ee02e2b
Aspect after-activation
HTTP status 200
Load time 1.879 s
Memory usage 4.42 MiB
JS errors None
Resource errors None

Media → Image Optimizer

Page screenshot: Media  → Image Optimizer
URL /wp-admin/upload.php?page=image-optimization-settings
Aspect menu-item
HTTP status 200
Load time 0.871 s
Memory usage 3.85 MiB
JS errors None
Resource errors None

Media → Bulk Optimization

Page screenshot: Media  → Bulk Optimization
URL /wp-admin/upload.php?page=image-optimization-bulk-optimization
Aspect menu-item
HTTP status 200
Load time 0.670 s
Memory usage 3.87 MiB
JS errors None
Resource errors None

Tools → Scheduled Actions

Page screenshot: Tools → Scheduled Actions
URL /wp-admin/tools.php?page=action-scheduler
Aspect menu-item
HTTP status 200
Load time 0.256 s
Memory usage 3.87 MiB
JS errors None
Resource errors None

Test site – Just another WordPress site

Page screenshot: Test site – Just another WordPress site
URL /
Aspect front-page
HTTP status 200
Load time 0.206 s
Memory usage 3.67 MiB
JS errors None
Resource errors None

Benchmark

URL Load time Memory usage
Inactive Active Change Inactive Active Change
/wp-admin/index.php0.395 s0.335 s-0.060 s3.51 MiB3.82 MiB+ 323.25 KiB
/wp-admin/edit.php0.210 s0.265 s+0.055 s3.57 MiB3.91 MiB+ 345.54 KiB
/wp-admin/post-new.php0.845 s1.139 s+0.294 s6.06 MiB6.6 MiB+ 551.71 KiB
/wp-admin/upload.php0.782 s1.010 s+0.228 s3.52 MiB3.88 MiB+ 360.59 KiB
/wp-admin/options-writing.php0.235 s0.259 s+0.024 s3.5 MiB3.8 MiB+ 310.34 KiB
/wp-admin/media-new.php0.284 s0.304 s+0.020 s3.49 MiB3.8 MiB+ 319.36 KiB
/wp-admin/edit-tags.php?taxonomy=category0.204 s0.262 s+0.058 s3.5 MiB3.82 MiB+ 324.8 KiB
/wp-admin/post-new.php?post_type=page0.753 s0.650 s-0.103 s6.05 MiB6.58 MiB+ 547.24 KiB
/wp-admin/options-discussion.php0.653 s0.359 s-0.294 s3.5 MiB3.8 MiB+ 307.46 KiB
/wp-admin/edit-comments.php0.347 s0.274 s-0.073 s3.52 MiB3.82 MiB+ 307.13 KiB
/0.415 s0.226 s-0.189 s3.5 MiB3.67 MiB+ 176.77 KiB
Average 0.466 s0.462 s-0.004 s3.98 MiB4.32 MiB+ 352.2 KiB

Code Statistics

Note: Third-party libraries and minified JS/CSS files are excluded from these statistics where possible, so the numbers you see here may be lower than those reported by other tools.

PHP
JavaScript
Language % Lines of code Comment lines Files
PHP83.3%10,4611,991169
JavaScript14.4%1,80611939
CSS2.2%27026
SVG0.1%1602
Total 12,553 2,112 216

PHP Code Analysis | More results »

Lines of code 9,738
Total complexity 1,541
Median class complexity 6.0
Median method complexity 1.0
Most complex class ImageOptimization\Classes\Rest\Route
Most complex function ImageOptimization\Modules\Optimization\Components\Media_Control::render_optimization_control()
Classes 150
Methods 749
Functions 0

Additions

Things that the plugin adds to the site. This section is not intended to be comprehensive. The test tool only looks for a few specific types of added content.

Options wp_options 14

Custom Post Types 1

ID Name
scheduled-actionScheduled Actions

PHP Error Log 10 lines

[30-Sep-2025 20:10:04 UTC] [Image Optimizer]: info in ImageOptimization\Modules\Core\Components\Migrations->run_migration(): The migration `fix_optimized_size_keys` successfully executed.
[30-Sep-2025 20:10:04 UTC] [Image Optimizer]: info in ImageOptimization\Modules\Core\Components\Migrations->run_migration(): The migration `fix_mime_type` successfully executed.
[30-Sep-2025 20:10:04 UTC] [Image Optimizer]: info in ImageOptimization\Modules\Core\Components\Migrations->run_migration(): The migration `fix_avif_with_zero_dimensions` successfully executed.
[30-Sep-2025 20:10:04 UTC] [Image Optimizer]: info in ImageOptimization\Modules\Optimization\Components\Actions_Cleanup->cleanup_stuck_operations(): No stuck optimization operations found for cleanup.
[30-Sep-2025 20:10:07 UTC] [Image Optimizer]: info in ImageOptimization\Modules\ConnectManager\Components\Connect->get_connect_status(): Status check error. Reason: User is not connected
[30-Sep-2025 20:10:07 UTC] [Image Optimizer]: info in ImageOptimization\Modules\ConnectManager\Components\Connect->get_connect_status(): Status check error. Reason: User is not connected
[30-Sep-2025 20:10:09 UTC] [Image Optimizer]: info in ImageOptimization\Modules\ConnectManager\Components\Connect->get_connect_status(): Status check error. Reason: User is not connected
[30-Sep-2025 20:10:09 UTC] [Image Optimizer]: info in ImageOptimization\Modules\ConnectManager\Components\Connect->get_connect_status(): Status check error. Reason: User is not connected
[30-Sep-2025 20:10:15 UTC] [Image Optimizer]: info in ImageOptimization\Modules\ConnectManager\Components\Connect->get_connect_status(): Status check error. Reason: User is not connected
[30-Sep-2025 20:10:15 UTC] [Image Optimizer]: info in ImageOptimization\Modules\ConnectManager\Components\Connect->get_connect_status(): Status check error. Reason: User is not connected
See also: All tests for this plugin, How to Hide Image Optimizer - Compress, Resize and Optimize Images Admin Menus