@solid-primitives/memo - npm Package Compare versions

Comparing version 0.1.1 to 0.2.1

dist/index.js

@@ -10,3 +10,5 @@ // src/index.ts
   runWithOwner,
-  on
+  on,
+  getListener,
+  createRoot
 } from "solid-js";
@@ -85,20 +87,34 @@ import debounce from "@solid-primitives/debounce";
 function createLazyMemo(calc, value, options) {
+  var _a;
+  const owner = (_a = getOwner()) != null ? _a : void 0;
+  let listeners = 0;
+  let lastest = value;
+  let dirty = true;
   let memo;
-  let listeners = 0;
-  const owner = getOwner();
-  const recreateMemo = () => runWithOwner(owner, () => {
-    memo = createMemo((prev) => {
-      if (listeners)
-        return calc(prev);
-      memo = void 0;
-      return prev;
-    }, value, options);
-  });
+  let dispose;
+  onCleanup(() => dispose == null ? void 0 : dispose());
+  const track = createPureReaction(() => dirty = !memo);
   return () => {
-    if (getOwner()) {
-      listeners++;
-      onCleanup(() => listeners--);
+    if (!getListener()) {
+      if (memo)
+        return memo();
+      if (dirty)
+        track(() => lastest = calc(lastest));
+      dirty = false;
+      return lastest;
     }
-    if (!memo)
-      recreateMemo();
+    listeners++;
+    onCleanup(() => listeners--);
+    if (!memo) {
+      createRoot((_dispose) => {
+        dispose = _dispose;
+        memo = createMemo(() => {
+          if (listeners)
+            return lastest = calc(lastest);
+          dispose();
+          dispose = memo = void 0;
+          return lastest;
+        }, lastest, options);
+      }, owner);
+    }
     return memo();
@@ -105,0 +121,0 @@ };

package.json

 {
   "name": "@solid-primitives/memo",
-  "version": "0.1.1",
+  "version": "0.2.1",
   "description": "Collection of custom memo primitives. They extend Solid's createMemo functionality while keeping the usage similar.",
@@ -54,21 +54,21 @@ "author": "Damian Tarnawski @thetarnav <[e-mail]>",
     "@solid-primitives/throttle": "^1.2.0",
-    "@solid-primitives/utils": "^1.0.0"
+    "@solid-primitives/utils": "^2.0.1"
   },
   "devDependencies": {
-    "@solid-primitives/mouse": "^1.2.0",
+    "@solid-primitives/mouse": "^2.0.0",
     "jsdom": "^19.0.0",
-    "prettier": "^2.5.1",
-    "solid-app-router": "^0.2.0",
-    "solid-register": "^0.1.5",
-    "tslib": "^2.3.1",
-    "tsup": "^5.11.1",
-    "typescript": "^4.5.4",
-    "unocss": "0.24.3",
-    "uvu": "^0.5.2",
-    "vite": "2.8.1",
-    "vite-plugin-solid": "2.2.5"
+    "prettier": "^2.6.2",
+    "solid-app-router": "^0.3.3",
+    "solid-register": "^0.2.5",
+    "tslib": "^2.4.0",
+    "tsup": "^5.12.8",
+    "typescript": "^4.6.4",
+    "unocss": "0.34.0",
+    "uvu": "^0.5.3",
+    "vite": "2.9.9",
+    "vite-plugin-solid": "2.2.6"
   },
   "peerDependencies": {
-    "solid-js": "^1.3.1"
+    "solid-js": "^1.4.2"
   }
 }

README.md

@@ -87,2 +87,4 @@ <p>
 
+It may be useful for memos that aren't being listened to all the time, to reduce performance cost of wastefull computations.
+
 ### How to use it
@@ -110,2 +112,17 @@
 
+### Usage caveats
+
+There are vary few actual good applications of a lazy memo, that couldn't be solved with other means — like improving the data architecture. For example, you can always only create memos in places that you intend to use it in, instead of declaring it prematurely.
+
+```ts
+// instead of memo, distribute only a calculation function
+const getDouble = (n: number) => n * 2;
+// and only declare memo where you want to use it
+const double = createMemo(() => getDouble(count()));
+```
+
+A lazy memo won't work reliably with [Suspense](https://www.solidjs.com/docs/latest/api#<suspense>).
+
+There is a performance cost, from recreating and disposing computations, involved with using it over normal memo.
+
 ### Demo
@@ -319,2 +336,6 @@
 
+0.2.1
+
+`createLazyMemo` improvements
+
 </details>

No alert changes

Improved metrics

Total package byte prevSize

33042

increased by7.18%

Lines of code

467

increased by6.86%

Number of lines in readme file

339

increased by6.6%

Dependency changes

• + Added@solid-primitives/utils@2.2.1(transitive)

• - Removed@solid-primitives/utils@1.5.2(transitive)

• Updated@solid-primitives/utils@^2.0.1