public B preheat() {
            failIfAlreadyBuilt();
            this.preheatIterations = -1;
            return (B)this;
        }
Use the available testcases to preheat the jvm on this analyzer.
All available testcases will be run exactly once.
@return the current Builder instance.
analyzer/src/main/java/nl/basjes/parse/useragent/AbstractUserAgentAnalyzerDirect.java