# TEST Dev Notes: June 20th, 2023

*Optimize for speed; add support for image attachments & more*

By [Test](https://paragraph.com/@testxmtp) · 2023-08-01

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This is the first in a series of regular updates that we hope will be helpful as you continue to build and improve your user experience for web3 messaging with XMTP.

If you have any questions or feedback please feel free to reach out to us [on Discord](https://discord.gg/xmtp) or reply to this email -- we'd love to hear from you!

**💡Spotlight: Optimize performance for your app.**

[Test your app's performance](https://xmtp.org/docs/build/test-your-app), and [follow these guidelines](https://xmtp.org/docs/build/performance) to optimize it!

**⚙️ New features**

*   End-to-end encrypted image attachments ([view docs](https://xmtp.org/docs/build/attachments)) & optimistic sending ([view docs](https://xmtp.org/docs/tutorials/optimistic-sending))
    
    [![User Avatar](https://pbs.twimg.com/profile_images/1668323456935510016/2c_Ue8dF_normal.jpg)](https://twitter.com/xmtp_)
    
    [XMTP (hiring)](https://twitter.com/xmtp_)
    
    [@xmtp\_](https://twitter.com/xmtp_)
    
    [![Twitter Logo](https://paragraph.xyz/editor/twitter/logo.png)](https://twitter.com/xmtp_/status/1668753486153138176)
    
    Did you know you can DM wallets on [@lensterxyz](https://twitter.com/lensterxyz) ?  
      
    Ok now did you know you can even include attachments? photos, gifs, videos... yea, we just did that ![😎](https://twemoji.maxcdn.com/v/14.0.2/72x72/1f60e.png)  
      
    ![👀](https://twemoji.maxcdn.com/v/14.0.2/72x72/1f440.png) & peep that tick confirming the image was delivered! What. A. Beauty.
    
    ![](https://pbs.twimg.com/ext_tw_video_thumb/1668753466926469121/pu/img/Iwk0pan8RYertaNy.jpg)
    
     [![Like Icon](https://paragraph.xyz/editor/twitter/heart.png) 49](https://twitter.com/xmtp_/status/1668753486153138176)[
    
    6:53 PM • Jun 13, 2023
    
    ](https://twitter.com/xmtp_/status/1668753486153138176)
    

**📒Latest Dev Guides**

*   [XMTP notification server in macOS](https://xmtp.org/blog/setting-up-push-notification-server)
    
*   [Resolve identities using the Everyname API](https://xmtp.org/blog/everyname-resolution)
    

**👋 Find us at these upcoming events!**

*   [ETH Waterloo June 23-25](https://ethglobal.com/events/waterloo2023): Reply to this email if you'll be there, we'd love to meet up!

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*Originally published on [Test](https://paragraph.com/@testxmtp/test-dev-notes-june-20th,-2023)*