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  1. JDK
  2. JDK-8255729

com.sun.tools.javac.processing.JavacFiler.FilerOutputStream is inefficient

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    • Subcomponent:
    • Resolved In Build:
      b04
    • CPU:
      generic
    • OS:
      generic
    • Verification:
      Not verified

      Description

      ADDITIONAL SYSTEM INFORMATION :
      Java 8 all the way up to 15

      A DESCRIPTION OF THE PROBLEM :
      FilerOutputStream, which can be used by annotation processors to write source files, extends from FilterOutputStream without overwriting the write(byte[], offset, length) method. This means that content written to this stream is written to disk one byte at a time, greatly slowing down builds.


      CUSTOMER SUBMITTED WORKAROUND :
      Use JavaFileObject.openWriter instead, which does not suffer from this performance problem.

      FREQUENCY : always


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              Assignee:
              jjg Jonathan Gibbons
              Reporter:
              webbuggrp Webbug Group
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