# Mrview is slow to respond even load 5 million streamlines **URL:** \ **Category:** Uncategorized\ **Tags:** tractography\ **Created:** [March 23, 2025, 9:31pm UTC](https://community.mrtrix.org/t/mrview-is-slow-to-respond-even-load-5-million-streamlines/8292 "2025-03-23T21:31:26Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Yufeng\_He](https://community.mrtrix.org/user_avatar/community.mrtrix.org/yufeng_he/32/5003_2.png) [@Yufeng\_He](https://community.mrtrix.org/u/Yufeng_He)\ **Post date:** [March 23, 2025, 9:31pm UTC](https://community.mrtrix.org/t/mrview-is-slow-to-respond-even-load-5-million-streamlines/8292/1 "2025-03-23T21:31:26Z")
Dear experts, When I’m using mrview to browse my tck file, mrview becomes very laggy, even though my tck file only has 50,000 streamlines. My laptop’s chip is M4pro, running memory is 24G. I would like to know if this is normal, Or what settings can be turned on to optimize browsing. Hoping for anyone’s suggestions. I really appreciate any help you can provide. Yufeng ---
**Author:** ![szan](https://community.mrtrix.org/user_avatar/community.mrtrix.org/szan/32/5241_2.png) [@szan](https://community.mrtrix.org/u/szan)\ **Post date:** [March 23, 2025, 9:57pm UTC](https://community.mrtrix.org/t/mrview-is-slow-to-respond-even-load-5-million-streamlines/8292/2 "2025-03-23T21:57:57Z")
Hi Yufeng, I’ve experienced that in the past and [this solution](https://community.mrtrix.org/t/issues-with-pseudotube-rendering-on-apple-m1-macs/4505) fixed the issue for me. Best, Simone ---
**Author:** ![Yufeng\_He](https://community.mrtrix.org/user_avatar/community.mrtrix.org/yufeng_he/32/5003_2.png) [@Yufeng\_He](https://community.mrtrix.org/u/Yufeng_He)\ **Post date:** [March 24, 2025, 7:53am UTC](https://community.mrtrix.org/t/mrview-is-slow-to-respond-even-load-5-million-streamlines/8292/3 "2025-03-24T07:53:42Z")
It’s worked, thank you very very much 😀.