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Performance of the Java security manager
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DOI：10.1016/j.cose.2004.08.006.png)
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Abstract
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The Java Security Manager is one major security feature of the Java programming language. However, in many Java applications the Security Manager is not enabled because it slows execution time. This paper explores the performance of the Java Security Manager in depth, identifies the permissions with the worst performance and gives advice on how to use the Security Manager in a more efficient way. Our performance test shows that the CPU execution time penalty varies between 5% and 100% per resource access statement. This extreme range is due to the fact that some resource accesses are costly (such as file and socket access) and therefore hide the performance penalty for the access control check almost completely. The time penalty is much more noticeable with access to main memory resources (such as Java objects). In order to achieve reasonable response times, it is of utmost importance to tune garbage collection because the Java Security Manager creates short-lived objects during its permission check. Also, the order of permissions in the policy file can be important. (c) 2004 Elsevier Ltd. All rights reserved.
Keywords:
Java
performance
security
security manager
access controller
permission
policy
CPU execution time
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