private String readFile(String file) {
        try {
            return IOUtils.readFile(new File(file));
        } catch (IOException e) {
            throw new AssertionError(e);
        }
    }
Two small benchmarks of ranking expression evaluation

@author bratseth
searchlib/src/test/java/com/yahoo/searchlib/rankingexpression/evaluation/EvaluationBenchmark.java