python-smmap
Port variant py310
Summary Sliding window memory map manager (3.10)
Package version 5.0.1
Homepage https://github.com/gitpython-developers/smmap
Keywords python
Maintainer Python Automaton
License Not yet specified
Other variants v11
Ravenports Buildsheet | History
Ravensource Port Directory | History
Last modified 22 SEP 2023, 12:17:47 UTC
Port created 16 APR 2018, 00:49:48 UTC
Subpackage Descriptions
single ## Motivation When reading from many possibly large files in a fashion similar to random access, it is usually the fastest and most efficient to use memory maps. Although memory maps have many advantages, they represent a very limited system resource as every map uses one file descriptor, whose amount is limited per process. On 32 bit systems, the amount of memory you can have mapped at a time is naturally limited to theoretical 4GB of memory, which may not be enough for some applications. ## Limitations * **System resources (file-handles) are likely to be leaked!** This is due to the library authors reliance on a deterministic `__del__()` destructor. * The memory access is read-only by design. ## Overview ![Python package] Smmap wraps an interface around mmap and tracks the mapped files as well as the amount of clients who use it. If the system runs out of resources, or if a memory limit is reached, it will automatically unload unused maps to allow continued operation. To allow processing large files even on 32 bit systems, it allows only portions of the file to be mapped. Once the user reads beyond the mapped region, smmap will automatically map the next required region, unloading unused regions using a LRU algorithm. Although the library can be used most efficiently with its native interface, a Buffer implementation is provided to hide these details behind a simple string-like interface. For performance critical 64 bit applications, a simplified version of memory mapping is provided which always maps the whole file, but still provides the benefit of unloading unused mappings on demand. ## Prerequisites * Python 3.7+ * OSX, Windows or Linux The package was tested on all of the previously mentioned configurations. ## Installing smmap [Documentation Status] Its easiest to install smmap using the [pip] program: ```bash $ pip install smmap ``` As the command will install smmap in your respective python distribution, you will most likely need root permissions to authorize the required changes. If you have downloaded the source archive, the package can be installed by running the `setup.py` script: ```bash $ python setup.py install ``` It is advised to have a look at the **Usage Guide** for a brief introduction on the different database implementations. ## Homepage and Links The project is home on github at https://github.com/gitpython-developers/smmap . The latest source can be cloned from github as well: * git://github.com/gitpython-developers/smmap.git For support, please use the git-python mailing list: * http://groups.google.com/group/git-python Issues can be filed on github: * https://github.com/gitpython-developers/smmap/issues A link to the pypi page related to this repository: * https://pypi.org/project/smmap/ ## License Information *smmap* is licensed under the New BSD License.
Configuration Switches (platform-specific settings discarded)
PY310 ON Build using Python 3.10 PY311 OFF Build using Python 3.11
Package Dependencies by Type
Build (only) python-pip:single:py310
autoselect-python:single:standard
Build and Runtime python310:single:standard
Download groups
main mirror://PYPIWHL/a7/a5/10f97f73544edcdef54409f1d839f6049a0d79df68adbc1ceb24d1aaca42
Distribution File Information
e6d8668fa5f93e706934a62d7b4db19c8d9eb8cf2adbb75ef1b675aa332b69da 24282 smmap-5.0.1-py3-none-any.whl
Ports that require python-smmap:py310
python-gitdb:py310 Git Object Database (3.10)