[jboss-jira] [JBoss JIRA] (JBWEB-290) Optimize string literals inside jsp expressions
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https://issues.jboss.org/browse/JBWEB-290?page=com.atlassian.jira.plugin....
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John O'Hara commented on JBWEB-290:
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Thinking about this in more generalized terms, it occurs when the string concat operator +
is used within expressions. When parsing the jsp page, if we can remove string literals
from inside expressions and treat them as standard TemplateText nodes in the parser, we
can eliminate string concatenation within expressions and corresponding pressure placed on
the heap by StringBuilder
Optimize string literals inside jsp expressions
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Key: JBWEB-290
URL: https://issues.jboss.org/browse/JBWEB-290
Project: JBoss Web
Issue Type: Feature Request
Security Level: Public(Everyone can see)
Components: Tomcat
Affects Versions: JBossWeb-3.0.0.Final
Reporter: John O'Hara
Assignee: Remy Maucherat
After setting genStringAsCharArray=true, we continue to see StringBuilder concatenating
string literals for each jsp request for some of our jsp pages; instead of creating a
static char[].
This occurs when a string literal is included in a jsp expression, e.g.;
<%="<INPUT type=\"hidden\" name=\"name\"
value=\"" + obj.getName() + "\">"%>
Is it possible to identify string literals inside expressions during the tokenization
phase of parsing jsp pages in apache jasper and treat them as text nodes so that the
apache jasper generator can apply the same optimizations as string literals outside the
jsp expression?
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