From 5df02dced818bd9425e8119df4ace0800ffa73e2 Mon Sep 17 00:00:00 2001
From: Jakub Pawlowicz <contact@jakubpawlowicz.com>
Date: Sat, 2 Sep 2017 18:18:56 +0200
Subject: [PATCH] Fixes #960 - better explanation of `efficiency`.

---
 History.md | 5 +++++
 README.md  | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/History.md b/History.md
index e6fa991aa..56bfe1c09 100644
--- a/History.md
+++ b/History.md
@@ -6,6 +6,11 @@
 * Fixed issue [#895](https://github.com/jakubpawlowicz/clean-css/issues/895) - ignoring specific styles.
 * Fixed issue [#947](https://github.com/jakubpawlowicz/clean-css/issues/947) - selector based filtering.
 
+[4.1.8 / 2017-xx-xx](https://github.com/jakubpawlowicz/clean-css/compare/v4.1.7...4.1)
+==================
+
+* Fixed issue [#960](https://github.com/jakubpawlowicz/clean-css/issues/960) - better explanation of `efficiency` stat.
+
 [4.1.7 / 2017-07-14](https://github.com/jakubpawlowicz/clean-css/compare/v4.1.6...v4.1.7)
 ==================
 
diff --git a/README.md b/README.md
index 7fa0712f1..62a446c4f 100644
--- a/README.md
+++ b/README.md
@@ -448,7 +448,7 @@ console.log(output.warnings); // a list of warnings raised
 console.log(output.stats.originalSize); // original content size after import inlining
 console.log(output.stats.minifiedSize); // optimized content size
 console.log(output.stats.timeSpent); // time spent on optimizations in milliseconds
-console.log(output.stats.efficiency); // a ratio of output size to input size (e.g. 25% if content was reduced from 100 bytes to 75 bytes)
+console.log(output.stats.efficiency); // `(originalSize - minifiedSize) / originalSize`, e.g. 0.25 if size is reduced from 100 bytes to 75 bytes
 ```
 
 The `minify` method also accepts an input source map, e.g.