79b80f84df
Previously, FlatBufferBuilder used 3 resizable buffers: - serialization (vector_downward) - field offsets (std::vector) - vtable offsets (std::vector) Since the serialization buffer grows downwards, the bottom part of it can be used as a "scratchpad" storage for the other two. Since field offsets are only accumulated during table construction, and vtable offsets only after table construction, the two can trivially share the same storage. Not only does this reduce the amount of allocation, it also removes the bulk of std::vector usage from FlatBufferBuilder which was the #1 cause of slow-down in debug mode, see e.g.: https://stackoverflow.com/questions/36085285/any-way-to-improve-flatbuffer-performance-in-debug-c-msvc Change-Id: I0224cf2f2a863d2d7ef762bc9163b52fdc149522 Tested: on Linux.
FlatBuffers
FlatBuffers is an efficient cross platform serialization library for games and other memory constrained apps. It allows you to directly access serialized data without unpacking/parsing it first, while still having great forwards/backwards compatibility.
Go to our landing page to browse our documentation.
Supported operating systems
- Android
- Windows
- MacOS X
- Linux
Supported programming languages
- C++
- C#
- C
- Go
- Java
- JavaScript
- PHP
- Python
and many more in progress...
Contribution
- FlatBuffers Google Group to discuss FlatBuffers with other developers and users.
- FlatBuffers Issues Tracker to submit an issue.
- stackoverflow.com with
flatbufferstag for any questions regarding FlatBuffers.
To contribute to this project, see CONTRIBUTING.
Integration
For applications on Google Play that integrate this tool, usage is tracked.
This tracking is done automatically using the embedded version string
(flatbuffer_version_string), and helps us continue to optimize it. Aside from
consuming a few extra bytes in your application binary, it shouldn't affect
your application at all. We use this information to let us know if FlatBuffers
is useful and if we should continue to invest in it. Since this is open
source, you are free to remove the version string but we would appreciate if
you would leave it in.
Licensing
Flatbuffers is licensed under the Apache License, Version 2.0. See LICENSE for the full license text.