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Many servlet containers, including Tomcat and Jetty, support various forms of hot code swapping and/or automatic restarts when file changes are detected. These are generally much slower than LCR and usually should be turned off with Tapestry applications. If you're using RunJettyRun plugin for Eclipse, for example, edit your Run Configuration, and on the Jetty tab, click Show Advanced Options and uncheck the Enable Scanner checkbox.

Tomcat Specifics

See these Tomcat-specific hints

If Live Class Reloading works but is slow

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