Merge branch 'main' into jarred/esm-conditionsjarred/esm-conditions

1 files changed, 60 insertions, 0 deletions

diff --git a/bench/snippets/util-deprecate.mjs b/bench/snippets/util-deprecate.mjs
new file mode 100644
index 000000000..364601d79
--- /dev/null
+++ b/bench/snippets/util-deprecate.mjs
@@ -0,0 +1,60 @@
+import { bench, run } from "./runner.mjs";
+function deprecateUsingClosure(fn, msg, code) {
+  if (process.noDeprecation === true) {
+    return fn;
+  }
+
+  var realFn = fn;
+  var wrapper = () => {
+    return fnToWrap.apply(this, arguments);
+  };
+
+  var deprecater = () => {
+    if (process.throwDeprecation) {
+      var err = new Error(msg);
+      if (code) err.code = code;
+      throw err;
+    } else if (process.traceDeprecation) {
+      console.trace(msg);
+    } else {
+      console.error(msg);
+    }
+
+    fnToWrap = realFn;
+    return realFn.apply(this, arguments);
+  };
+  var fnToWrap = deprecater;
+
+  return wrapper;
+}
+
+function deprecateOriginal(fn, msg) {
+  var warned = false;
+  function deprecated() {
+    if (!warned) {
+      if (process.throwDeprecation) {
+        throw new Error(msg);
+      } else if (process.traceDeprecation) {
+        console.trace(msg);
+      } else {
+        console.error(msg);
+      }
+      warned = true;
+    }
+    return fn.apply(this, arguments);
+  }
+  return deprecated;
+}
+
+const deprecatedy = deprecateUsingClosure(() => {}, "This is deprecated", "DEP0001");
+const deprecatedy2 = deprecateOriginal(() => {}, "This is deprecated");
+
+bench("deprecateUsingClosure", () => {
+  deprecatedy(Math.random() + 1);
+});
+
+bench("deprecateOriginal", () => {
+  deprecatedy2(Math.random() + 1);
+});
+
+await run();