# Faster (and smaller) uploads in Discourse with Rust, WebAssembly and MozJPEG | Blog
**URL:** https://meta.discourse.org/t/faster-and-smaller-uploads-in-discourse-with-rust-webassembly-and-mozjpeg-blog/196998
**Category:** Blog
**Created:** [July 13, 2021, 3:38pm UTC](https://meta.discourse.org/t/faster-and-smaller-uploads-in-discourse-with-rust-webassembly-and-mozjpeg-blog/196998 "2021-07-13T15:38:30Z")
**Posts on this page:** 20
**Page:** 1
### Author:  [@Falco](https://meta.discourse.org/u/Falco)
#### Post date: [July 13, 2021, 3:38pm UTC](https://meta.discourse.org/t/faster-and-smaller-uploads-in-discourse-with-rust-webassembly-and-mozjpeg-blog/196998/1 "2021-07-13T15:38:31Z")
As of a few weeks ago, image uploads in Discourse are faster AND smaller thanks to a technique that compresses and optimizes the images clientside _before_ they are uploaded. This blog post will describe how this feature works and how we implemented it in Discourse.
* * *
This is a companion discussion topic for the original entry at [https://blog.discourse.org/2021/07/faster-user-uploads-on-discourse-with-rust-webassembly-and-mozjpeg/](https://blog.discourse.org/2021/07/faster-user-uploads-on-discourse-with-rust-webassembly-and-mozjpeg/)
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### Author:  [@tobiaseigen](https://meta.discourse.org/u/tobiaseigen)
#### Post date: [July 13, 2021, 4:12pm UTC](https://meta.discourse.org/t/faster-and-smaller-uploads-in-discourse-with-rust-webassembly-and-mozjpeg-blog/196998/2 "2021-07-13T16:12:23Z")
Amazing! š This is an incredible improvement. Really great work. Itās so much more fun to upload and share photos in discussions now.
And an added benefit - people on slow connections are going to be able to upload a bunch of photos at a time now without the dreaded āUploadingā¦ā appearing instead of the photo. š
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### Author:  [@JimPas](https://meta.discourse.org/u/JimPas)
#### Post date: [July 14, 2021, 2:38am UTC](https://meta.discourse.org/t/faster-and-smaller-uploads-in-discourse-with-rust-webassembly-and-mozjpeg-blog/196998/3 "2021-07-14T02:38:11Z")
Nice improvementā¦ and Happy Birthday, Rafael!
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### Author:  [@erlend\_sh](https://meta.discourse.org/u/erlend_sh)
#### Post date: [July 14, 2021, 10:35pm UTC](https://meta.discourse.org/t/faster-and-smaller-uploads-in-discourse-with-rust-webassembly-and-mozjpeg-blog/196998/4 "2021-07-14T22:35:10Z")
Super psyched to see Discourse playing more with the power of Rust! š¦ šŖ
[imageflow](https://github.com/imazen/imageflow) is another impressive Rust lib in this space.
I took the liberty of sharing the news here:
https://embed.reddit.com/r/rust/comments/okehky/faster_and_smaller_uploads_in_discourse_with_rust/?embed=true&ref_source=embed&ref=share
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### Author:  [@TGP](https://meta.discourse.org/u/TGP)
#### Post date: [July 16, 2021, 11:03pm UTC](https://meta.discourse.org/t/faster-and-smaller-uploads-in-discourse-with-rust-webassembly-and-mozjpeg-blog/196998/5 "2021-07-16T23:03:02Z")
This is something I have on my site right now? Meaning yāall shipped this level of improved functionality out to everyone just because you want a better product?
Part of me knows thatās true. Iāve been around enough to know how yāall roll, but damn. Part of me feels like I missed the part where this is an advanced optimization play.
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### Author:  [@JimPas](https://meta.discourse.org/u/JimPas)
#### Post date: [July 19, 2021, 6:29am UTC](https://meta.discourse.org/t/faster-and-smaller-uploads-in-discourse-with-rust-webassembly-and-mozjpeg-blog/196998/6 "2021-07-19T06:29:48Z")
> [@TGP](#):
>
> This is something I have on my site right now? Meaning yāall shipped this level of improved functionality out to everyone just because you want a better product?
Yes and yes. š
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### Author:  [@TGP](https://meta.discourse.org/u/TGP)
#### Post date: [July 20, 2021, 2:28pm UTC](https://meta.discourse.org/t/faster-and-smaller-uploads-in-discourse-with-rust-webassembly-and-mozjpeg-blog/196998/7 "2021-07-20T14:28:54Z")
### _Freakinā radical, man._
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### Author:  [@fuzzyk](https://meta.discourse.org/u/fuzzyk)
#### Post date: [July 30, 2021, 6:05pm UTC](https://meta.discourse.org/t/faster-and-smaller-uploads-in-discourse-with-rust-webassembly-and-mozjpeg-blog/196998/8 "2021-07-30T18:05:35Z")
Getting lots of complaints from Android users about jumping cursors and degraded upload performance, unfortunately.
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### Author:  [@Falco](https://meta.discourse.org/u/Falco)
#### Post date: [July 30, 2021, 7:43pm UTC](https://meta.discourse.org/t/faster-and-smaller-uploads-in-discourse-with-rust-webassembly-and-mozjpeg-blog/196998/9 "2021-07-30T19:43:38Z")
> [@fuzzyk](#):
>
> jumping cursors
I have a PR open that will greatly improve the cursor/placeholder handling during multiple file uploads
[https://github.com/discourse/discourse/pull/13907](https://github.com/discourse/discourse/pull/13907)
> [@fuzzyk](#):
>
> degraded upload performance
If all of the following are true:
- You donāt care about storage costs
- Most of your user base has good internet upload
- Most of your audience browses from average or worse Android phones
You may want to either disable the feature or tweak the threshold for minimum size up a few megabytes.
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### Author:  [@fuzzyk](https://meta.discourse.org/u/fuzzyk)
#### Post date: [July 30, 2021, 7:57pm UTC](https://meta.discourse.org/t/faster-and-smaller-uploads-in-discourse-with-rust-webassembly-and-mozjpeg-blog/196998/10 "2021-07-30T19:57:05Z")
> [@Falco](#):
>
> I have a PR open that will greatly improve the cursor/placeholder handling during multiple file uploads
Thatās great to hear!
Sadly, many of my users have cheap-ish/older Android phones, so I wonāt be re-enabling the feature any time soon. Havenāt had any problems myself on my iPhone 12.
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### Author:  [@tobiaseigen](https://meta.discourse.org/u/tobiaseigen)
#### Post date: [July 30, 2021, 8:01pm UTC](https://meta.discourse.org/t/faster-and-smaller-uploads-in-discourse-with-rust-webassembly-and-mozjpeg-blog/196998/11 "2021-07-30T20:01:56Z")
Falco, would it be possible or of interest to provide a user setting for this, so people who want it can choose to use it? Or an option to āuse classic image uploaderā as craigslist does it? Selecting that button toggles the upload method.
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### Author:  [@Falco](https://meta.discourse.org/u/Falco)
#### Post date: [July 30, 2021, 8:05pm UTC](https://meta.discourse.org/t/faster-and-smaller-uploads-in-discourse-with-rust-webassembly-and-mozjpeg-blog/196998/12 "2021-07-30T20:05:05Z")
> [@fuzzyk](#):
>
> Sadly, many of my users have cheap-ish/older Android phones, so I wonāt be re-enabling the feature any time soon. Havenāt had any problems myself on my iPhone 12.
Maybe tweak the minimum size for it, so itās only triggers on file larger than 3MB, so old phones wonāt reach it on their own camera pictures.
> [@tobiaseigen](#):
>
> would it be possible or of interest to provide a user setting for this
That was included in the [original RFC](https://meta.discourse.org/t/optional-image-optimization-before-upload/187656) but it was removed according to the comments received.
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### Author:  [@Don](https://meta.discourse.org/u/Don)
#### Post date: [July 31, 2021, 11:30am UTC](https://meta.discourse.org/t/faster-and-smaller-uploads-in-discourse-with-rust-webassembly-and-mozjpeg-blog/196998/13 "2021-07-31T11:30:20Z")
Hi Rafael,
I think we have a little problem with the new placeholder handling. It seems the images goes inline not a new line. Not just on composer pre optimization but regular uploads too. Thanks š
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### Author:  [@Falco](https://meta.discourse.org/u/Falco)
#### Post date: [August 2, 2021, 6:44pm UTC](https://meta.discourse.org/t/faster-and-smaller-uploads-in-discourse-with-rust-webassembly-and-mozjpeg-blog/196998/14 "2021-08-02T18:44:10Z")
This should fix it
[https://github.com/discourse/discourse/pull/13917](https://github.com/discourse/discourse/pull/13917)
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### Author:  [@Don](https://meta.discourse.org/u/Don)
#### Post date: [August 7, 2021, 5:47pm UTC](https://meta.discourse.org/t/faster-and-smaller-uploads-in-discourse-with-rust-webassembly-and-mozjpeg-blog/196998/15 "2021-08-07T17:47:04Z")
Hello Rafael,
Sorry I am late but tested just now. š It works fine on multiple uploads if i drag images in new line but it seems the issue still there if drag image(s) the end of a text. Thank you š
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### Author:  [@codinghorror](https://meta.discourse.org/u/codinghorror)
#### Post date: [August 29, 2021, 8:26pm UTC](https://meta.discourse.org/t/faster-and-smaller-uploads-in-discourse-with-rust-webassembly-and-mozjpeg-blog/196998/16 "2021-08-29T20:26:14Z")
Is it all good now @Don?
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### Author:  [@Don](https://meta.discourse.org/u/Don)
#### Post date: [August 30, 2021, 1:17am UTC](https://meta.discourse.org/t/faster-and-smaller-uploads-in-discourse-with-rust-webassembly-and-mozjpeg-blog/196998/17 "2021-08-30T01:17:07Z")
It seems to this one still happening.
> [@Don](#):
>
> it seems the issue still there if drag image(s) the end of a text.
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### Author:  [@yhh9xdq7d](https://meta.discourse.org/u/yhh9xdq7d)
#### Post date: [January 11, 2022, 9:00am UTC](https://meta.discourse.org/t/faster-and-smaller-uploads-in-discourse-with-rust-webassembly-and-mozjpeg-blog/196998/18 "2022-01-11T09:00:17Z")
Has this been fixed? @Falco
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### Author:  [@codinghorror](https://meta.discourse.org/u/codinghorror)
#### Post date: [January 13, 2022, 5:49am UTC](https://meta.discourse.org/t/faster-and-smaller-uploads-in-discourse-with-rust-webassembly-and-mozjpeg-blog/196998/19 "2022-01-13T05:49:53Z")
Sorry, what is a bug in that video? That looks exactly as I would expect it to work?
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### Author:  [@Don](https://meta.discourse.org/u/Don)
#### Post date: [January 13, 2022, 6:05am UTC](https://meta.discourse.org/t/faster-and-smaller-uploads-in-discourse-with-rust-webassembly-and-mozjpeg-blog/196998/20 "2022-01-13T06:05:23Z")
I missed this feature [A setting to always insert images as separate paragraphs - #16 by andrei](https://meta.discourse.org/t/a-setting-to-always-insert-images-as-separate-paragraphs/138769/16) which is I think works well until this commit [Faster (and smaller) uploads in Discourse with Rust, WebAssembly and MozJPEG | Blog - #9 by Falco](https://meta.discourse.org/t/faster-and-smaller-uploads-in-discourse-with-rust-webassembly-and-mozjpeg-blog/196998/9) not sure. š
I have a video from my community about this feature when I presented to the members.
[Next page](https://meta.discourse.org/t/faster-and-smaller-uploads-in-discourse-with-rust-webassembly-and-mozjpeg-blog/196998.md?page=2)