# \#regression **URL:** https://fenicsproject.discourse.group/tag/regression/54.md [Latest](https://fenicsproject.discourse.group/latest.md) · [Categories](https://fenicsproject.discourse.group/categories.md) · [Tags](https://fenicsproject.discourse.group/tags.md) --- ## [Collapsing mixed space takes unreasonably long](https://fenicsproject.discourse.group/t/collapsing-mixed-space-takes-unreasonably-long/15071)
**Author:** [@Stein](https://fenicsproject.discourse.group/u/Stein)\ **Replies:** 3\ **Last updated:** [June 26, 2024, 9:58am UTC](https://fenicsproject.discourse.group/t/collapsing-mixed-space-takes-unreasonably-long/15071 "2024-06-26T09:58:10Z")
Hi, For various projects I have noticed that collapsing a mixed function space that includes a vector component takes unreasonably long (it is by orders of magnitude the longest executing line in the entire code). For s…