/** * Copyright (c) Meta Platforms, Inc. and affiliates. * * 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 * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */

folly/FBString.h

folly/FBString.h

fbstring is a drop-in replacement for std::string. The main benefit of fbstring is significantly increased performance on virtually all important primitives. This is achieved by using a three-tiered storage strategy and by cooperating with the memory allocator. In particular, fbstring is designed to detect use of jemalloc and cooperate with it to achieve significant improvements in speed and memory usage.

fbstring supports 32- and 64-bit and little- and big-endian architectures.

Storage strategies


Implementation highlights