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Do not enable lazy locking by default.

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Do not enable lazy locking by default, because:
- It's fragile (applications can subvert detection of multi-threaded
  mode).
- Thread caching amortizes locking overhead in the default
  configuration.
This commit is contained in:
Jason Evans
2012-02-13 12:36:11 -08:00
parent 6ffbbeb5d6
commit 0fee70d718
2 changed files with 6 additions and 6 deletions
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@@ -128,8 +128,8 @@ any of the following arguments (not a definitive list) to 'configure':
a measurable impact on performance, since the compiler is forced to load
the page size from memory rather than embedding immediate values.
--disable-lazy-lock
Disable code that wraps pthread_create() to detect when an application
--enable-lazy-lock
Enable code that wraps pthread_create() to detect when an application
switches from single-threaded to multi-threaded mode, so that it can avoid
mutex locking/unlocking operations while in single-threaded mode. In
practice, this feature usually has little impact on performance unless