Joel Richard created SLING-5117:
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Summary: Reuse PrintWriter to avoid initialisation overhead
Key: SLING-5117
URL: https://issues.apache.org/jira/browse/SLING-5117
Project: Sling
Issue Type: Improvement
Components: Scripting
Reporter: Joel Richard
Priority: Minor
Surprisingly, java.io.PrintWriter is relatively expensive to initialise because
of the AccessController.doPrivileged call in the constructor. Right now, it
initialises for each include a new PrintWriter which costs 2-3% rendering time.
In order to avoid this overhead, I would suggest to fix SLING-1284 properly (as
far as I have seen there is a real fix in Tomcat) and create a reusable
PrintWriter in PageContextImpl together with the JspWriter. In addition, the
OnDemandWriterResponse must be adjusted to not create a new PrintWriter. Maybe,
all the OnDemand* classes could also just be removed.
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