What can I do to improve severe lag time?

Question

I am dealing with severe lag on my Trello. This has been happening for about 2 months and nothing I do is rectifying the situation.

I have switched browser, cleared all caches, history and preformed all system updates. I have checked and verified server is fine and even purchased a new computer.

The lag time is incredibly frustrating. If I @ someone on the board I have to wait at least a minute before it shows up. If I don't wait for if to show up before I type their name the @ doesn't show up at all and then I have to wait to erase what I typed. I have to move uploads over to the card 5 or 6 times before the upload actually takes and I can't scroll up or down without wait time as well. When typing notes I can type a paragraph before the words start to populate on the card. If I move the card I have a prolonged wait time between each of those actions as well.

Before the lagging started we would deal with multiple "Disconnected from Trello" messages in an hour. These messages seem to have slowed considerably since the lagging started.

My boss has no problem with his Trello, however he is not as active a user as me and my co-worker. We are on Trello 8.5 hours a day, 5 days a week. My co-worker is experiencing the same performance issues and took all previously mentioned steps (including the purchase of a new computer) to try to avoid dealing with this frustration on a daily basis. We also make it so we only have 1 or 2 windows open while using Trello in a futile effort to speed it up. It took him 4 hours to make 25 Trello cards with all needed information filled out.

All other functions and uploads on the computer work fine, this severe lag is only present when using Trello.

I would really appreciate some guidance on this. Trello has been a life saver for us but unfortunately it is turning into a torture test.

Thank you.

Rebecca MacDonald_xo7ch5 · Answer

Thank you for reaching out. The lag time has not improved.

Stacy · Answer

Hi @Rebecca MacDonald - We identified a change that may have impacted performance on large boards in particular. I'm not sure if this is related to what you are seeing but that change has been rolled back, so I'm curious, is the issue better today after refreshing?

Germán Morales · Answer

Hi @Rebecca MacDonald , welcome to the Atlassian Community!

The repeated Disconnected from Trello messages make a connection or network-path issue more likely than a computer problem. The next useful test is not another computer: it is a different network and an empty board.

* Connect one affected computer to a phone hotspot or another network, then test both the usual board and a newly created empty board.
* If Trello becomes responsive on the other network, ask your IT team to review its firewall, proxy, DNS, and security filtering against Trello’s official firewall allowlist.
* If the empty board is fast but the normal board remains slow, open the board filter and enter * to count its open cards. Trello recommends fewer than 1,000 open cards, or fewer than 500 when cards contain many attachments or checklists. Archive older cards or move lists to a history board, as described in Troubleshooting a slow board.

If an empty board also lags on a different network, open the browser console with Ctrl+Shift+J, reproduce one delayed action, and capture the errors and exact time. That would rule out the usual hardware, browser, network, and board-size causes and provide useful evidence for Atlassian to investigate.

Until the cause is identified, reload Trello periodically during long sessions. When the disconnected warning appears, reload before making further edits because unsynced changes may not be saved. See Losing connection to Trello servers.