perf: pass pointers to utf8 over the FFI #2781
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lwwmanning
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a10y
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Switch from JNA -> JNI. On some microbenchmarks I've seen this result in a ~3x speedup for simple string-passing. I wired this into the Iceberg fork for Vortex and am seeing an immediate ~40% speedup on Citibike scan queries Subsequently #2781 gives us another 2x speedup on Citibike.
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Switch from JNA -> JNI. On some microbenchmarks I've seen this result in a ~3x speedup for simple string-passing. I wired this into the Iceberg fork for Vortex and am seeing an immediate ~40% speedup on Citibike scan queries Subsequently #2781 gives us another 2x speedup on Citibike.
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Spark column vectors return
UTF8Strings, which can wrap one ofStringbyte[]Previously we've been using the String pathway, this PR changes our Java scans to canonicalize on read (
.with_canonicalize(true)), and sends back to Java a ptr + len pair.This patch when ferried down into Iceberg gives us another 2x speedup on Citibike scan