Function writeFileSync_DEPRECATED

source code/utils/slowOperations.ts:250–288

(
  filePath: string,
  data: string | NodeJS.ArrayBufferView,
  options?: WriteFileOptionsWithFlush,
)

 * Sync file writes block the event loop and cause performance issues.
 */
export function writeFileSync_DEPRECATED(
  filePath: string,
  data: string | NodeJS.ArrayBufferView,
  options?: WriteFileOptionsWithFlush,
): void {
  using _ = slowLogging`fs.writeFileSync(${filePath}, ${data})`

  // Check if flush is requested (for object-style options)
  const needsFlush =
    options !== null &&
    typeof options === 'object' &&
    'flush' in options &&
    options.flush === true

  if (needsFlush) {
    // Manual flush: open file, write, fsync, close
    const encoding =
      typeof options === 'object' && 'encoding' in options
        ? options.encoding
        : undefined
    const mode =
      typeof options === 'object' && 'mode' in options
        ? options.mode
        : undefined
    let fd: number | undefined
    try {
      fd = openSync(filePath, 'w', mode)
      fsWriteFileSync(fd, data, { encoding: encoding ?? undefined })
      fsyncSync(fd)
    } finally {
      if (fd !== undefined) {
        closeSync(fd)
      }
    }
  } else {
    // No flush needed, use standard writeFileSync
    fsWriteFileSync(filePath, data, options as WriteFileOptions)
  }
}