diff --git a/src/plots/cartesian/set_convert.js b/src/plots/cartesian/set_convert.js
index 9a696633554..1ff1a2196d4 100644
--- a/src/plots/cartesian/set_convert.js
+++ b/src/plots/cartesian/set_convert.js
@@ -600,16 +600,29 @@ module.exports = function setConvert(ax, fullLayout) {
         var rangebreaksIn = ax.rangebreaks || [];
         var bnds, b0, b1, vb, vDate;
 
+
+        if(!rangebreaksIn._cachedPatterns) {
+            rangebreaksIn._cachedPatterns = rangebreaksIn.map(function(brk) {
+                return brk.enabled && brk.bounds ? Lib.simpleMap(brk.bounds, brk.pattern ?
+                    cleanNumber :
+                    ax.d2c // case of pattern: ''
+                ) : null;
+            });
+        }
+        if(!rangebreaksIn._cachedValues) {
+            rangebreaksIn._cachedValues = rangebreaksIn.map(function(brk) {
+                return brk.enabled && brk.values ? Lib.simpleMap(brk.values, ax.d2c).sort(Lib.sorterAsc) : null;
+            });
+        }
+
+
         for(var i = 0; i < rangebreaksIn.length; i++) {
             var brk = rangebreaksIn[i];
 
             if(brk.enabled) {
                 if(brk.bounds) {
                     var pattern = brk.pattern;
-                    bnds = Lib.simpleMap(brk.bounds, pattern ?
-                        cleanNumber :
-                        ax.d2c // case of pattern: ''
-                    );
+                    bnds = rangebreaksIn._cachedPatterns[i];
                     b0 = bnds[0];
                     b1 = bnds[1];
 
@@ -653,7 +666,7 @@ module.exports = function setConvert(ax, fullLayout) {
 
                     if(vb >= b0 && vb < b1) return BADNUM;
                 } else {
-                    var vals = Lib.simpleMap(brk.values, ax.d2c).sort(Lib.sorterAsc);
+                    var vals = rangebreaksIn._cachedValues[i];
                     for(var j = 0; j < vals.length; j++) {
                         b0 = vals[j];
                         b1 = b0 + brk.dvalue;