Nitsan Wakart created CASSANDRA-11421:
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Summary: Eliminate allocations of byte array for UTF8 String
serializations
Key: CASSANDRA-11421
URL: https://issues.apache.org/jira/browse/CASSANDRA-11421
Project: Cassandra
Issue Type: Improvement
Components: Core
Reporter: Nitsan Wakart
When profiling a read workload (YCSB workload c) on Cassandra 3.2.1 I noticed a
large part of allocation profile was generated from String.getBytes() calls on
CBUtil::writeString
I have fixed up the code to use a thread local cached ByteBuffer and
CharsetEncoder to eliminate the allocations. This results in improved
allocation profile, and a mild improvement in performance.
The fix is available here:
https://github.com/nitsanw/cassandra/tree/fix-write-string-allocation
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