> The standard doclet works by creating `HtmlDocument` objects and then writing 
> them out. Writing them can be safely done on a separate thread, and doing so 
> results in about an 8% speedup, by overlapping the write/IO time with the 
> time to generate the next page to be written.
> 
> The overall impact on the codebase is deliberately small, coming down to a 
> critical `if` statement in `HtmlDocletWriter` to "write now" or "write 
> later". As such, it is easy to disable the feature if necessary, although no 
> issues have been found in practice. The background writer uses an 
> `ExecutorService`, which provides a lot of flexibility, but experiments show 
> that it is sufficient to use a single background thread and to block if new 
> tasks come available while writing a file.
> 
> The feature is "default on", with a hidden option to disable it if necessary.

Jonathan Gibbons has updated the pull request incrementally with one additional 
commit since the last revision:

  Address review comments
  Improve option handling.

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/2665/files
  - new: https://git.openjdk.java.net/jdk/pull/2665/files/e9c4b11d..68702597

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=2665&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=2665&range=00-01

  Stats: 170 lines in 5 files changed: 105 ins; 29 del; 36 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2665.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2665/head:pull/2665

PR: https://git.openjdk.java.net/jdk/pull/2665

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