lib: avoid memory allocation on no-deprecation flag

lib/internal/modules/esm/resolve.js

@@ -75,6 +75,9 @@ const emittedPackageWarnings = new SafeSet();
  * @param {string} base - The URL of the module that imported the package.
  */
 function emitTrailingSlashPatternDeprecation(match, pjsonUrl, base) {
+  if (process.noDeprecation) {
+    return;
+  }
   const pjsonPath = fileURLToPath(pjsonUrl);
   if (emittedPackageWarnings.has(pjsonPath + '|' + match)) { return; }
   emittedPackageWarnings.add(pjsonPath + '|' + match);
@@ -101,6 +104,9 @@ const doubleSlashRegEx = /[/\\][/\\]/;
  * @param {boolean} isTarget - Whether the target is a module.
  */
 function emitInvalidSegmentDeprecation(target, request, match, pjsonUrl, internal, base, isTarget) {
+  if (process.noDeprecation) {
+    return;
+  }
   const pjsonPath = fileURLToPath(pjsonUrl);
   const double = RegExpPrototypeExec(doubleSlashRegEx, isTarget ? target : request) !== null;
   process.emitWarning(
@@ -123,6 +129,9 @@ function emitInvalidSegmentDeprecation(target, request, match, pjsonUrl, interna
  * @param {string} [main] - The "main" field from the package.json file.
  */
 function emitLegacyIndexDeprecation(url, packageJSONUrl, base, main) {
+  if (process.noDeprecation) {
+    return;
+  }
   const format = defaultGetFormatWithoutErrors(url);
   if (format !== 'module') { return; }
   const path = fileURLToPath(url);

lib/internal/process/warning.js

@@ -127,6 +127,11 @@ function onWarning(warning) {
 // process.emitWarning(str[, type[, code]][, ctor])
 // process.emitWarning(str[, options])
 function emitWarning(warning, type, code, ctor) {
+  // Fast path to avoid memory allocation,
+  // this doesn't eliminate the other if a few lines below
+  if (process.noDeprecation && type === 'DeprecationWarning') {
+    return;
+  }
   let detail;
   if (type !== null && typeof type === 'object' && !ArrayIsArray(type)) {
     ctor = type.ctor;