Only compute key when necessary.

dlongley · davidlehn · commit 03b252a77308 · 2018-08-16T17:02:08.000-04:00
diff --git a/lib/ActiveContextCache.js b/lib/ActiveContextCache.js
@@ -18,9 +18,9 @@ module.exports = class ActiveContextCache {
   }
 
   get(activeCtx, localCtx) {
-    const key = JSON.stringify(localCtx);
     const level1 = this.cache.get(activeCtx);
     if(level1) {
+      const key = JSON.stringify(localCtx);
       const result = level1.get(key);
       return result || null;
     }

Original file line number	Diff line number	Diff line change
`@@ -18,9 +18,9 @@ module.exports = class ActiveContextCache {`
`18`	`18`	`}`
`19`	`19`
`20`	`20`	`get(activeCtx, localCtx) {`
`21`		`- const key = JSON.stringify(localCtx);`
`22`	`21`	`const level1 = this.cache.get(activeCtx);`
`23`	`22`	`if(level1) {`
	`23`	`+ const key = JSON.stringify(localCtx);`
`24`	`24`	`const result = level1.get(key);`
`25`	`25`	`return result \|\| null;`
`26`	`26`	`}`