[perf-web] Handle duplication of times when merging incoming data

[Owen Taylor <otaylor src gnome org>]

commit 7319e4d16a076dbe6c83f28c600c210f65a01f56
Author: Owen W. Taylor <otaylor fishsoup net>
Date:   Sun Jun 29 15:22:36 2014 -0400

    Handle duplication of times when merging incoming data
    
    In some edge cases - if we're expecting to discard data but don't
    because API calls fail, for example - we might try to merge old and
    new data sets with identical points. In that case, don't duplicate
    data for the times.

 static/main.js |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/static/main.js b/static/main.js
index f3bb4dc..d7db7c9 100644
--- a/static/main.js
+++ b/static/main.js
@@ -42,6 +42,10 @@ ValueBuffer.prototype.merge = function(other) {
         } else  {
             newData[newPos] = other.data[otherPos];
             newData[newPos + 1] = other.data[otherPos + 1];
+            if (this.data[thisPos] == other.data[otherPos]) {
+                thisPos += 2;
+                newLength--;
+            }
             otherPos += 2;
         }