Implement configurable minimap redraw delay

lib/minimap.js

@@ -162,6 +162,15 @@ class Minimap {
      * @access private
      */
     this.configDevicePixelRatioRounding = null
+    /**
+     * A number of milliseconds which determines how often the minimap should redraw itself after
+     * detecting changes in the text editor. A value of 0 will cause the minimap to redraw
+     * immediately.
+     *
+     * @type {number}
+     * @access private
+     */
+    this.redrawDelay = 0
     /**
      * A boolean value to store whether this Minimap have been destroyed or not.
      *
@@ -305,10 +314,15 @@ class Minimap {
   scheduleChanges (changes) {
     this.pendingChangeEvents.push(...changes)
 
-    // If any changes happened within the timeout's delay, a timeout will already have been
-    // scheduled -> no need to schedule again
+    // Optimisation: If the redraw delay is set to 0, do not even schedule a timer
+    if (!this.redrawDelay) {
+      return this.flushChanges()
+    }
+
     if (!this.flushChangesTimer) {
-      this.flushChangesTimer = setTimeout(() => { this.flushChanges() }, 1000)
+      // If any changes happened within the timeout's delay, a timeout will already have been
+      // scheduled -> no need to schedule again
+      this.flushChangesTimer = setTimeout(() => { this.flushChanges() }, this.redrawDelay)
     }
   }
 
@@ -455,6 +469,9 @@ class Minimap {
     subs.add(atom.config.observe('minimap.scrollSensitivity', opts, (scrollSensitivity) => {
       this.scrollSensitivity = scrollSensitivity
     }))
+    subs.add(atom.config.observe('minimap.redrawDelay', opts, (redrawDelay) => {
+      this.redrawDelay = redrawDelay
+    }))
     // cdprr is shorthand for configDevicePixelRatioRounding
     subs.add(atom.config.observe(
       'minimap.devicePixelRatioRounding',

package.json

@@ -71,6 +71,13 @@
       "type": "boolean",
       "default": true
     },
+    "redrawDelay": {
+      "type": "number",
+      "default": 0,
+      "minimum": 0,
+      "maximum": 1000,
+      "description": "Controls how often (in ms) the minimap should redraw itself after changing the text editor's contents. Setting this to 100ms or higher could dramatically improve editor responsiveness when working with large files. A value of 0 will cause the minimap to redraw itself immediately on each change."
+    },
     "adjustMinimapWidthToSoftWrap": {
       "type": "boolean",
       "default": true,