[pgjdbc/pgjdbc] e2623d: perf: fix 1ms per async CopyAPI (regression since ...

  Branch: refs/heads/master
  Home:   https://github.com/pgjdbc/pgjdbc
  Commit: e2623d63d4b6fad0b12fb9ace842475e4a9134dc
      https://github.com/pgjdbc/pgjdbc/commit/e2623d63d4b6fad0b12fb9ace842475e4a9134dc
  Author: Vladimir Sitnikov <[email protected]>
  Date:   2018-10-25 (Thu, 25 Oct 2018)

  Changed paths:
    M CHANGELOG.md
    M docs/_posts/2018-08-27-42.2.5-release.md
    M pgjdbc/src/main/java/org/postgresql/core/PGStream.java
    M pgjdbc/src/main/java/org/postgresql/core/v3/CopyDualImpl.java
    M pgjdbc/src/main/java/org/postgresql/core/v3/replication/V3ReplicationProtocol.java

  Log Message:
  -----------
  perf: fix 1ms per async CopyAPI (regression since 42.2.5) (#1314)

The problem is SSL sockets use buffers for input, and `stream#available()` might easily return 0 even though the data is available in the downstream socket. The only viable WA is to perform `read` calls, however it might impact performance (e.g. for async copy operations). The resolution is to throttle read calls for copy api, and keep 1ms reads for replication api.

fixes #1312



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