spring-boot

Spring Boot

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Andy Wilkinson d241171fff Use fast exceptions in hasMoreElements in LaunchedURLClassLoader When nested jars are being used, hasMoreElements requires opening a connection for an entry in every nested jar. If that entry doesn't exist, a FileNotFoundException is thrown to indicate that a particular jar doesn't contain the requested entry. This exception is used to indicate the lack of an entry and is then swallowed, i.e. its stack trace is of no importance. This means that the performance of hasMoreElements can be improved by switching on fast exceptions while it's being called. When fast exceptions are switched on a general purpose pre-initialized FileNotFoundException is thrown rather than creating a new FileNotFoundException instance each time. In certain situations, the use of fast exceptions as described above can improve performance fairly significantly. The JRE's default SAAJ implementation uses META-INF/services-based discovery for _every_ request that's handled by Spring Web Services. Each discovery attempt results in hasMoreElements being called making its performance critical to throughput. See gh-3640	11 years ago
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src	Use fast exceptions in hasMoreElements in LaunchedURLClassLoader	11 years ago
pom.xml	Next development version	11 years ago

Andy Wilkinson d241171fff Use fast exceptions in hasMoreElements in LaunchedURLClassLoader

When nested jars are being used, hasMoreElements requires opening a
connection for an entry in every nested jar. If that entry doesn't
exist, a FileNotFoundException is thrown to indicate that a particular
jar doesn't contain the requested entry. This exception is used to
indicate the lack of an entry and is then swallowed, i.e. its stack
trace is of no importance. This means that the performance of
hasMoreElements can be improved by switching on fast exceptions while
it's being called. When fast exceptions are switched on a general
purpose pre-initialized FileNotFoundException is thrown rather than
creating a new FileNotFoundException instance each time.

In certain situations, the use of fast exceptions as described above
can improve performance fairly significantly. The JRE's default SAAJ
implementation uses META-INF/services-based discovery for _every_
request that's handled by Spring Web Services. Each discovery attempt
results in hasMoreElements being called making its performance
critical to throughput.

See gh-3640

11 years ago

src

Use fast exceptions in hasMoreElements in LaunchedURLClassLoader

11 years ago

pom.xml

Next development version

11 years ago