I am migrating a tool to use fs2 (v3.9.2).
The first step is just to collect about 26000 files in a directory tree for further processing.

Here are the timings of this first step for several solutions:

• java.nio.file.Files#walkFileTree: 0.5s
• DeprecatedFilesApi.walk: 0.7s
• fs2.io.file.Files#walk: 4s