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Code autocomplete and reference hint are slow in java JDK 9.0.1

Code autocomplete and reference hint are significantly slower (5 to 10 seconds waiting for hints to load) in Java JDK 9.0.1 with maven projects as compared to previous Java JDK versions (1.7.x, and 1.8.x) (hints are loaded under 1 second). Half of the time, hints don't load at all.

Environment
  • Operating System: windows 10
  • JDK version: 9.0.1
  • Visual Studio Code version: 1.19.1
  • Java extension version: 0.16.0
Additional information
  • Maven pom.xml configurations:
<properties>
	<java.version>9</java.version>
</properties>

If java.version is set to 1.8 in pom.xml, code completion and reference hints work fine.