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https://issues.apache.org/jira/browse/THRIFT-4555?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16440479#comment-16440479
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ASF GitHub Bot commented on THRIFT-4555:
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bpodgursky commented on issue #1540: THRIFT-4555 Optionally disable copies of
binary fields in Java constructors, getters, and setters
URL: https://github.com/apache/thrift/pull/1540#issuecomment-381864455
Thanks!
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> Getter of binary field in Java creates unnecessary copy
> -------------------------------------------------------
>
> Key: THRIFT-4555
> URL: https://issues.apache.org/jira/browse/THRIFT-4555
> Project: Thrift
> Issue Type: Improvement
> Components: Java - Compiler
> Affects Versions: 0.11.0
> Reporter: Joel Croteau
> Priority: Minor
> Fix For: 0.12.0
>
>
> The get[field] method in generated Java code generates a new copy of a binary
> field every time it is called. This seems incredibly inefficient. Take a
> simple example struct:
> {code:java}
> struct StructWithBinary {
> 1: required binary field;
> }
> {code}
> a portion of the generated code for this is:
> {code:java}
> public byte[] getField() {
> setField(org.apache.thrift.TBaseHelper.rightSize(field));
> return field == null ? null : field.array();
> }
> ...
> public StructWithBinary setField(java.nio.ByteBuffer field) {
> this.field = org.apache.thrift.TBaseHelper.copyBinary(field);
> return this;
> }
> {code}
> So whenever getField is called, setField calls copyBinary and generates
> another copy. This adds quite a lot of overhead to the getter here and should
> be fixed.
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