default long preHeat(long preheatIterations, boolean log) {
        return preHeat(internalGetTestCasesForPreheat(), preheatIterations, log);
    }
Runs the number of specified testcases to heat up the JVM.
@param preheatIterations Number of desired tests to run.
@param log Enable logging?
@return Number of actually done testcases.
analyzer/src/main/java/nl/basjes/parse/useragent/AnalyzerPreHeater.java