android_system_core/base
Elliott Hughes 8c253d4d42 Avoid zero-initializing our most-used buffers.
The StringPrintf one is heavily used and brings the overhead versus
fmtlib down to 1.5x rather than 2x. I don't have a convenient benchmark
for the other two.

Test: libbase tests & benchmarks
Bug: http://b/155324241
Change-Id: I9e704a360846d5520c53f668e7c315b0c0ea55f8
2020-04-29 14:10:12 -07:00
..
include/android-base
tidy
.clang-format
Android.bp
CPPLINT.cfg
OWNERS
README.md
abi_compatibility.cpp
chrono_utils.cpp
chrono_utils_test.cpp
cmsg.cpp
cmsg_test.cpp
endian_test.cpp
errors_test.cpp
errors_unix.cpp
errors_windows.cpp
expected_test.cpp
file.cpp Avoid zero-initializing our most-used buffers. 2020-04-29 14:10:12 -07:00
file_test.cpp
format_benchmark.cpp
liblog_symbols.cpp
liblog_symbols.h
logging.cpp Avoid zero-initializing our most-used buffers. 2020-04-29 14:10:12 -07:00
logging_splitters.h
logging_splitters_test.cpp
logging_test.cpp
macros_test.cpp
mapped_file.cpp
mapped_file_test.cpp
no_destructor_test.cpp
parsebool.cpp
parsebool_test.cpp
parsedouble_test.cpp
parseint_test.cpp
parsenetaddress.cpp
parsenetaddress_test.cpp
process.cpp
process_test.cpp
properties.cpp
properties_test.cpp
result_test.cpp
scopeguard_test.cpp
stringprintf.cpp Avoid zero-initializing our most-used buffers. 2020-04-29 14:10:12 -07:00
stringprintf_test.cpp
strings.cpp
strings_test.cpp
test_main.cpp
test_utils.cpp
test_utils_test.cpp
threads.cpp
utf8.cpp
utf8_test.cpp

README.md

libbase

Who is this library for?

This library is a collection of convenience functions to make common tasks easier and less error-prone.

In this context, "error-prone" covers both "hard to do correctly" and "hard to do with good performance", but as a general purpose library, libbase's primary focus is on making it easier to do things easily and correctly when a compromise has to be made between "simplest API" on the one hand and "fastest implementation" on the other. Though obviously the ideal is to have both.

Should my routine be added?

The intention is to cover the 80% use cases, not be all things to all users.

If you have a routine that's really useful in your project, congratulations. But that doesn't mean it should be here rather than just in your project.

The question for libbase is "should everyone be doing this?"/"does this make everyone's code cleaner/safer?". Historically we've considered the bar for inclusion to be "are there at least three unrelated projects that would be cleaned up by doing so".

If your routine is actually something from a future C++ standard (that isn't yet in libc++), or it's widely used in another library, that helps show that there's precedent. Being able to say "so-and-so has used this API for n years" is a good way to reduce concerns about API choices.

Any other restrictions?

Unlike most Android code, code in libbase has to build for Mac and Windows too.

Code here is also expected to have good test coverage.

By its nature, it's difficult to change libbase API. It's often best to start using your routine just in your project, and let it "graduate" after you're certain that the API is solid.