FasterFinnSort: stackLen calculation

app/src/main/java/de/uni_marburg/powersort/FinnSort/FasterFinnSort.java

@@ -171,23 +171,8 @@ public class FasterFinnSort<T> {
             tmpLen = workLen;
         }
 
-        /*
-         * Allocate runs-to-be-merged stack (which cannot be expanded).  The
-         * stack length requirements are described in listsort.txt.  The C
-         * version always uses the same stack length (85), but this was
-         * measured to be too expensive when sorting "mid-sized" arrays (e.g.,
-         * 100 elements) in Java.  Therefore, we use smaller (but sufficiently
-         * large) stack lengths for smaller arrays.  The "magic numbers" in the
-         * computation below must be changed if MIN_MERGE is decreased.  See
-         * the MIN_MERGE declaration above for more information.
-         * The maximum value of 49 allows for an array up to length
-         * Integer.MAX_VALUE-4, if array is filled by the worst case stack size
-         * increasing scenario. More explanations are given in section 4 of:
-         * http://envisage-project.eu/wp-content/uploads/2015/02/sorting.pdf
-         */
-        int stackLen = (len <    120  ?  5 :
-                len <   1542  ? 10 :
-                        len < 119151  ? 24 : 49);
+        // TODO: Verify if this is correct
+        int stackLen = ((int) Math.ceil(Math.log(rangeSize))) + 2;
         runBase = new int[stackLen];
         runLen = new int[stackLen];
         runPower = new int[stackLen];