How seriously should I take Benchmark results ran on swift-next snapshots?

I just ran a round of a package's benchmarks with 6.4.x-snapshot which is installed via swiftly. The default Swift version is Swift 6.3 (swiftly again). This is on Ubuntu 24.04. The results are mixed, more on the side of "things got worse". How seriously should I take these results? Do the snapshots have some caveats that can affect release builds and thus benchmarks (e.g. "assert builds enabled")? Or no, these must be plain regressions in LLVM/Swift? If yes, what can I do short of recompil...