Large file optimization for updating outline

Author: aminya

dist/main.js

@@ -97,3 +97,32 @@ async function editorTokenized(editor: Atom.TextEditor) {
  }
  })
 }
+
+// From https://github.com/atom-community/atom-ide-outline/blob/ec1a7197d63055de910562da3cc2b95fd939afc4/src/main.ts#L53
+// minimum number of line length to trigger large file optimizations
+const longLineLength =
+ (atom.config.get("linter-ui-default.longLineLength") as number | null) ?? 4000
+// minimum number of lines to trigger large file optimizations
+const largeFileLineCount =
+ ((atom.config.get("linter-ui-default.largeFileLineCount") as number | null) ?? 3000) / 6
+
+export function lineCountIfLarge(editor: Atom.TextEditor) {
+ // @ts-ignore
+ if (editor.largeFileMode) {
+ return 20000
+ }
+ const lineCount = editor.getLineCount()
+ if (lineCount >= largeFileLineCount) {
+ // large file detection
+ return lineCount
+ } else {
+ // long line detection
+ const buffer = editor.getBuffer()
+ for (let i = 0, len = lineCount; i < len; i++) {
+ if (buffer.lineLengthForRow(i) > longLineLength) {
+ return longLineLength
+ }
+ }
+ return 0 // small file
+ }
+}

dist/main.js.map

@@ -1,6 +1,7 @@
 import {CompositeDisposable, Disposable, Point, TextEditor} from "atom"
 import * as etch from "etch"
 import {isEqual} from "lodash"
+import debounce from "lodash/debounce"
 import {NavigationTree} from "typescript/lib/protocol"
 import {GetClientFunction} from "../../../../client"
 import * as atomUtils from "../../utils"
@@ -205,7 +206,10 @@ export class NavigationTreeComponent
  // set navTree
  await this.loadNavTree()
 
+ const lineCount = atomUtils.lineCountIfLarge(editor)
  this.editorScrolling = editor.onDidChangeCursorPosition(this.selectAtCursorLine)
- this.editorChanging = editor.onDidStopChanging(this.loadNavTree)
+ this.editorChanging = editor.onDidStopChanging(
+ lineCount === 0 ? this.loadNavTree : debounce(this.loadNavTree, Math.max(lineCount / 5, 300)),
+ )
  }
 }