hollow/src/main/java/com/netflix/hollow/tools/diff/HollowDiff.java
public void calculateDiffs() {
        long startTime = System.currentTimeMillis();

        prepareForDiffCalculation();

        long endTime = System.currentTimeMillis();

        log.info("PREPARED IN " + (endTime - startTime) + "ms");

        for(HollowTypeDiff typeDiff : typeDiffs.values()) {
            typeDiff.calculateDiffs();
        }
    }
public void calculateDiffs() {
        long startTime = System.currentTimeMillis();

        prepareForDiffCalculation();

        long endTime = System.currentTimeMillis();

        log.info("PREPARED IN " + (endTime - startTime) + "ms");

        for(HollowTypeDiff typeDiff : typeDiffs.values()) {
            typeDiff.calculateDiffs();
        }
    }
Run the diff