RFR: 8291266: RenderPerfTest: missing content while rendering some primitives [v2]

[Alexey Ushakov]

> Do not cause redundant endEncoder calls with batch processing of drawing primitives

Alexey Ushakov has updated the pull request incrementally with one additional commit since the last revision:

  8291266: RenderPerfTest: missing content while rendering some primitives
  
  Added regression test

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Changes:
  - all: https://git.openjdk.org/jdk/pull/9756/files
  - new: https://git.openjdk.org/jdk/pull/9756/files/a55f8f17..26a9e3f0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=9756&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=9756&range=00-01

  Stats: 150 lines in 1 file changed: 150 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/9756.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9756/head:pull/9756

PR: https://git.openjdk.org/jdk/pull/9756