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  * Copyright (C) 2009 The Guava Authors
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.
Methods factored out so that they can be emulated differently in GWT.

Jesse Wilson
@GwtCompatible(emulated = true)
final class Platform {
  private Platform() {}

Returns a thread-local 1024-char array.
  static char[] charBufferFromThreadLocal() {
    return .get();
  static long systemNanoTime() {
    return System.nanoTime();

A thread-local destination buffer to keep us from creating new buffers. The starting size is 1024 characters. If we grow past this we don't put it back in the threadlocal, we just keep going and grow as needed.
  private static final ThreadLocal<char[]> DEST_TL = new ThreadLocal<char[]>() {
    protected char[] initialValue() {
      return new char[1024];
    return matcher.precomputedInternal();
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