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On JDK 20+ Files.exists, isDirectory and isRegularFile call these provider methods; the inherited defaults threw and caught NoSuchFileException for every missing file.
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On JDK 20+
Files.exists/isDirectory/isRegularFilecallFileSystemProvider.exists/readAttributesIfExists; the inherited defaults throw and catchNoSuchFileExceptionfor every missing file. Overriding them (no@Override, still compiles for Java 11) avoids the exception.existsMissing: 1297 -> 39 ns/op (JDK 21, benchmark from #97).Checked with Endive (wasi-tests, machine-tests, wabt, Zig stdlib suite): no regressions.