[CASSANDRA-21141][trunk] Reduce memory allocation during transformation of BatchStatement to Mutation #4589
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clohfink
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src/java/org/apache/cassandra/cql3/restrictions/PartitionKeyRestrictions.java
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…utation avoid ClusteringIndexSliceFilter allocation if a write does not required a read (plain usual write), avoid iterator allocation, use array instead of ArrayList for perStatementOptions which does not grow dynamically BatchStatement: check if many similar rows for the same table are written unconditionally, in this case we can avoid columns info merging and builders allocation add fast path in nonTokenRestrictionValues logic, when we specify a single partition key (a single row) to modify, optimize also the case if a partition or clustering key is a single column add fast path in valuesAsClustering logic, when we specify a single clustering key (a single row) to modify UpdateParameters: allocate DeletionTime on demand (it is not needed if we do insert/updates) serializedRowBodySize: avoid capturing lamda allocation per cell by moving capturing arguments to SerializationHelper (same optimization as it was done in serializeRowBody) force hash3_x64_128 inlining to help JIT with escape analysis and long[] heap allocation elimination patch by Dmitry Konstantinov; reviewed by Chris Lohfink for CASSANDRA-21141
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Reduce memory allocation during transformation of BatchStatement to Mutation
Patch by Dmitry Konstantinov; reviewed by TBD or CASSANDRA-21141