lib: remove startsWith/endsWith primordials for char checks

lib/_http_agent.js

@@ -341,7 +341,7 @@ function calculateServerName(options, req) {
  // abc:123 => abc
  // [::1] => ::1
  // [::1]:123 => ::1
- if (hostHeader.startsWith('[')) {
+ if (hostHeader[0] === '[') {
  const index = hostHeader.indexOf(']');
  if (index === -1) {
  // Leading '[', but no ']'. Need to do something...

lib/internal/main/watch_mode.js

@@ -46,7 +46,7 @@ for (let i = 0; i < process.execArgv.length; i++) {
  if (StringPrototypeStartsWith(arg, '--watch')) {
  i++;
  const nextArg = process.execArgv[i];
- if (nextArg && StringPrototypeStartsWith(nextArg, '-')) {
+ if (nextArg && nextArg[0] === '-') {
  ArrayPrototypePush(argsWithoutWatchOptions, nextArg);
  }
  continue;

lib/internal/modules/esm/fetch_module.js

@@ -3,9 +3,7 @@ const {
  ObjectPrototypeHasOwnProperty,
  PromisePrototypeThen,
  SafeMap,
- StringPrototypeEndsWith,
  StringPrototypeSlice,
- StringPrototypeStartsWith,
 } = primordials;
 const {
  Buffer: { concat: BufferConcat },
@@ -248,8 +246,9 @@ allowList.addRange('127.0.0.1', '127.255.255.255');
 async function isLocalAddress(hostname) {
  try {
  if (
- StringPrototypeStartsWith(hostname, '[') &&
- StringPrototypeEndsWith(hostname, ']')
+ hostname.length &&
+ hostname[0] === '[' &&
+ hostname[hostname.length - 1] === ']'
  ) {
  hostname = StringPrototypeSlice(hostname, 1, -1);
  }

lib/internal/modules/esm/resolve.js

@@ -373,8 +373,9 @@ function resolvePackageTargetString(
  }
 
  if (!StringPrototypeStartsWith(target, './')) {
- if (internal && !StringPrototypeStartsWith(target, '../') &&
- !StringPrototypeStartsWith(target, '/')) {
+ if (internal &&
+ target[0] !== '/' &&
+ !StringPrototypeStartsWith(target, '../')) {
  // No need to convert target to string, since it's already presumed to be
  if (!URLCanParse(target)) {
  const exportTarget = pattern ?

lib/internal/modules/helpers.js

@@ -202,7 +202,7 @@ function addBuiltinLibsToObject(object, dummyModuleName) {
  ArrayPrototypeForEach(builtinModules, (name) => {
  // Neither add underscored modules, nor ones that contain slashes (e.g.,
  // 'fs/promises') or ones that are already defined.
- if (StringPrototypeStartsWith(name, '_') ||
+ if (name[0] === '_' ||
  StringPrototypeIncludes(name, '/') ||
  ObjectPrototypeHasOwnProperty(object, name)) {
  return;

lib/internal/process/per_thread.js

@@ -25,7 +25,6 @@ const {
  StringPrototypeEndsWith,
  StringPrototypeReplace,
  StringPrototypeSlice,
- StringPrototypeStartsWith,
  Symbol,
  SymbolIterator,
 } = primordials;
@@ -296,7 +295,7 @@ function buildAllowedFlags() {
  }
 
  function isAccepted(to) {
- if (!StringPrototypeStartsWith(to, '-') || to === '--') return true;
+ if (!to.length || to[0] !== '-' || to === '--') return true;
  const recursiveExpansion = aliases.get(to);
  if (recursiveExpansion) {
  if (recursiveExpansion[0] === to)

lib/internal/process/pre_execution.js

@@ -13,7 +13,6 @@ const {
  ObjectDefineProperty,
  ObjectFreeze,
  String,
- StringPrototypeStartsWith,
  globalThis,
 } = primordials;
 
@@ -206,8 +205,7 @@ function patchProcessObject(expandArgv1) {
  let mainEntry;
  // If requested, update process.argv[1] to replace whatever the user provided with the resolved absolute file path of
  // the entry point.
- if (expandArgv1 && process.argv[1] &&
- !StringPrototypeStartsWith(process.argv[1], '-')) {
+ if (expandArgv1 && process.argv[1] && process.argv[1][0] !== '-') {
  // Expand process.argv[1] into a full path.
  const path = require('path');
  try {

lib/internal/repl/utils.js

@@ -10,12 +10,10 @@ const {
  RegExpPrototypeExec,
  SafeSet,
  SafeStringIterator,
- StringPrototypeEndsWith,
  StringPrototypeIndexOf,
  StringPrototypeLastIndexOf,
  StringPrototypeReplaceAll,
  StringPrototypeSlice,
- StringPrototypeStartsWith,
  StringPrototypeToLowerCase,
  StringPrototypeTrim,
  Symbol,
@@ -298,8 +296,7 @@ function setupPreview(repl, contextSymbol, bufferSymbol, active) {
  function getInputPreview(input, callback) {
  // For similar reasons as `defaultEval`, wrap expressions starting with a
  // curly brace with parenthesis.
- if (StringPrototypeStartsWith(input, '{') &&
- !StringPrototypeEndsWith(input, ';') && !wrapped) {
+ if (!wrapped && input[0] === '{' && input[input.length - 1] !== ';') {
  input = `(${input})`;
  wrapped = true;
  }

lib/internal/url.js

@@ -1416,7 +1416,7 @@ function urlToHttpOptions(url) {
  __proto__: null,
  ...url, // In case the url object was extended by the user.
  protocol: url.protocol,
- hostname: hostname && StringPrototypeStartsWith(hostname, '[') ?
+ hostname: hostname && hostname[0] === '[' ?
  StringPrototypeSlice(hostname, 1, -1) :
  hostname,
  hash: url.hash,

lib/internal/util/inspect.js

@@ -1190,7 +1190,7 @@ function getClassBase(value, constructor, tag) {
 
 function getFunctionBase(value, constructor, tag) {
  const stringified = FunctionPrototypeToString(value);
- if (StringPrototypeStartsWith(stringified, 'class') && StringPrototypeEndsWith(stringified, '}')) {
+ if (StringPrototypeStartsWith(stringified, 'class') && stringified[stringified.length - 1] === '}') {
  const slice = StringPrototypeSlice(stringified, 5, -1);
  const bracketIndex = StringPrototypeIndexOf(slice, '{');
  if (bracketIndex !== -1 &&
@@ -1573,7 +1573,8 @@ function handleMaxCallStackSize(ctx, err, constructorName, indentationLvl) {
 function addNumericSeparator(integerString) {
  let result = '';
  let i = integerString.length;
- const start = StringPrototypeStartsWith(integerString, '-') ? 1 : 0;
+ assert(i !== 0);
+ const start = integerString[0] === '-' ? 1 : 0;
  for (; i >= start + 4; i -= 3) {
  result = `_${StringPrototypeSlice(integerString, i - 3, i)}${result}`;
  }

lib/repl.js

@@ -130,7 +130,7 @@ const { shouldColorize } = require('internal/util/colors');
 const CJSModule = require('internal/modules/cjs/loader').Module;
 let _builtinLibs = ArrayPrototypeFilter(
  CJSModule.builtinModules,
- (e) => !StringPrototypeStartsWith(e, '_'),
+ (e) => e[0] !== '_',
 );
 const nodeSchemeBuiltinLibs = ArrayPrototypeMap(
  _builtinLibs, (lib) => `node:${lib}`);