improve symbol replacement heuristic (#2851)

2018-01-29 17:41:15 +08:00
parent 6fa3fbeae8
commit 541e6011af
2 changed files with 33 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -5237,7 +5237,7 @@ merge(Compressor.prototype, {
                    var name_length = d.name.length;
                    var overhead = 0;
                    if (compressor.option("unused") && !compressor.exposed(d)) {
-                        overhead = (name_length + 2 + value_length) / d.references.length;
+                        overhead = (name_length + 2 + value_length) / (d.references.length - d.assignments);
                    }
                    d.should_replace = value_length <= name_length + overhead ? fn : false;
                } else {