FilePermission Canonical path optimization

Bernd ecki at
Mon Dec 1 08:43:43 UTC 2014


I thik the underscores in method and field do not match very the other
names in that file (or the JCL).

If I understand right, this is an optimization for the case a security
manager is not present? For the other case, maybe having absolute but not
canonical file names is an option? Or maybe have a special optimization for
JAVA_HOME prefixed names? Or does it help in that case as well?

Am 01.12.2014 09:18 schrieb "deven you" <youdwei at>:

> Hi All,
>  File.getCanonicalPath() is a very time-consuming method, we observed
> significant performance degradation from some application's startup stage
> with However, lazying load the calls to
> getCanonicalPath() from java.ioFilePermission is straightforward and solve
> this problem effectively. Openjdk bug[1]  tracks this bug and here is the
> patch [2]. Could anyone take a look?
> [1]
> [2]

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