Lucee 7 and Tomcat's virtual threads

dswitzer · January 22, 2026, 3:56pm

Just curious if Lucee 7 has been tested with Tomcat’s virtual threads (i.e. Project Loom) enabled on the connector. While it seems like it could speed things up, I’ve read that your code should avoid synchronized blocks and use ReentrantLock to prevent thread pinning.

I haven’t reviewed the Lucee 7 code, but I know previously synchronized blocks were highly used.

Just wonder if there’s been any real testing with actively enabling virtual threads w/Lucee 7.

Zackster · January 23, 2026, 9:22am

Lucee 7 has support but current disabled

github.com

lucee/Lucee/blob/7.0/core/src/main/java/lucee/runtime/thread/ThreadUtil.java#L57


      
          import lucee.runtime.config.Config;
          import lucee.runtime.config.ConfigWeb;
          import lucee.runtime.config.Constants;
          import lucee.runtime.net.http.HTTPServletRequestWrap;
          import lucee.runtime.net.http.HttpServletRequestDummy;
          import lucee.runtime.net.http.HttpServletResponseDummy;
          import lucee.runtime.type.Struct;
          
          public final class ThreadUtil {
          
          	private static final boolean ALLOW_FUTURE_THREADS = false;
          	// private static final Class<?> THREAD_CLASS = Thread.class;
          	private static final Class<?> RUNNABLE_CLASS = Runnable.class;
          	private static Class<?> threadBuilderClass;
          	private static boolean virtualDisabled = false;
          
          	public static Class<?> getThreadBuilderClass() throws ClassNotFoundException {
          		if (threadBuilderClass == null) {
          			threadBuilderClass = Class.forName("java.lang.Thread$Builder$OfVirtual");
          		}
          		return threadBuilderClass;

The war on synchronized has been underway for several years