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-rw-r--r--src/utility.js4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/utility.js b/src/utility.js
index 40b16a97..e49c8509 100644
--- a/src/utility.js
+++ b/src/utility.js
@@ -302,3 +302,7 @@ function sleep(secs) {
while (Date.now() - start < secs*1000) {};
}
+function log2(x) {
+ return Math.log(x)/Math.LN2;
+}
+