I personall would recomment ImageProcessor
You can read some information here : https://world.episerver.com/blogs/vincent-baaij/dates/2017/10/episerver-and-imageprocessor-more-choice-for-developers-and-designers/
My Recommedation is for ImageResizer
It's quite easy to setup and use. Very effective to performance.
You can also use great tool from Geta.
Are you talking about fresh load speed and time? or subsequent load? Have you configured a proper static file caching? Do you have CDN in place?
Resize Plugin can only fix one of many issues, have a look from configuration and infrastructure side to see if it help with better outcome.
Adding comments here (because it is eliminating package information)
That's fine, you should be able to see the packages like this
<package id="ImageResizer" version="4.2.5" targetFramework="net47" />
<package id="ImageResizer.Plugins.EPiServerBlobReader" version="7.2.0" targetFramework="net47" />
<package id="ImageResizer.WebConfig" version="4.2.5" targetFramework="net47" />
You can see the extension methods in
var src = Html.ResizeImage(imageSrcUrl, (int?) imageWidth, (int?) imageHeight);
See below link, section What about local images?
Link for extension (from above )
Or, in VS you can directly download
Kindly suggest some tool or plugin for image resizer for existing blobs.
Page with images is taking lot of time to open.