add cache

mod.ts

@@ -0,0 +1 @@
+export * from './src/index';

package.json

@@ -1,6 +1,6 @@
 {
   "name": "messagepipe",
-  "version": "0.2.2",
+  "version": "0.2.3",
   "description": "Formats message strings with number, date, plural, and select placeholders to create localized messages",
   "main": "dist/index.js",
   "module": "dist/index.esm.js",

src/messagepipe.ts

@@ -8,13 +8,33 @@ export interface MessagePipeTransformers {
   [key: string]: MessagePipeTransformer;
 }
 
-export function MessagePipe(transformers: MessagePipeTransformers = {}) {
+export interface MessagePipeOptions {
+  disableCache?: boolean;
+}
+
+const rcache: Record<string, any> = {};
+const scache: Record<string, any> = {};
+
+export function MessagePipe(transformers: MessagePipeTransformers = {}, { disableCache = false }: MessagePipeOptions = {}) {
+
   function compileRaw<Output = string[]>(message: string): (props?: Record<string, any>) => Output {
-    return Function('b', 'return (a)=>[' + parser(message).join(',') + ']')(transformers);
+    if (!disableCache && rcache[message]) {
+      return rcache[message];
+    }
+
+    const parsedMessage = Function('b', 'return (a)=>[' + parser(message).join(',') + ']');
+
+    return disableCache ? parsedMessage(transformers) : rcache[message] = parsedMessage(transformers);
   }
 
   function compile<Output = string>(message: string): (props?: Record<string, any>) => Output {
-    return Function('b', 'return (a)=>' + parser(message).join('+'))(transformers);
+    if (!disableCache && scache[message]) {
+      return scache[message];
+    }
+
+    const parsedMessage = Function('b', 'return (a)=>' + parser(message).join('+'));
+
+    return disableCache ? parsedMessage(transformers) : scache[message] = parsedMessage(transformers);
   }
 
   return {