ajkh88 commented on code in PR #7481:
URL: https://github.com/apache/hbase/pull/7481#discussion_r2585444216
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hbase-hadoop-compat/src/main/java/org/apache/hadoop/hbase/regionserver/MetricsRegionWrapper.java:
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@@ -166,4 +166,13 @@ public interface MetricsRegionWrapper {
/** Returns the number of row reads on memstore and file per store */
Map<String, Long> getMixedRowReadsCount();
+ /**
+ * Returns a SHA-256 hash of the table descriptor that this region was
opened with. This hash
Review Comment:
Modern x86 (SHA-NI), ARM (Crypto Extensions), and RISC-V CPUs have hardware
SHA instruction sets that significantly accelerate SHA-256 operations. The JVM
can leverage these via native libraries if available, making this much faster
than software implementations. That said, if you think CRC32 would still be
meaningfully faster here, I'm happy to make that change!
Reference: https://en.wikipedia.org/wiki/SHA_instruction_set
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