Jemalloc 5.4.0 (github.com)

They resumed development on jemalloc only recently, after years of no releases.

I just checked whether it's the first release after Jason Evans stepped down as maintainer, but it isn't. That was the previous release, 5.3.1

The noted resumption and likely a small amount of halo effect from the Comparison of Malloc() Algorithms thread two / three days ago.

- https://news.ycombinator.com/item?id=49715318