prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  optimizing `transform_geom` for repeated transformations
  Related to: https://github.com/Toblerity/Fiona/issues/799
  
  Is there interest in adding this to rasterio as well?
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `rasterio/compat.py`
  Content:
  ```
  1 """Python 2-3 compatibility."""
  2 
  3 import itertools
  4 import sys
  5 import warnings
  6 
  7 
  8 if sys.version_info[0] >= 3:   # pragma: no cover
  9     string_types = str,
  10     text_type = str
  11     integer_types = int,
  12     zip_longest = itertools.zip_longest
  13     import configparser
  14     from urllib.parse import urlparse
  15     from collections import UserDict
  16     from collections.abc import Iterable, Mapping
  17     from inspect import getfullargspec as getargspec
  18 else:  # pragma: no cover
  19     warnings.warn("Python 2 compatibility will be removed after version 1.1", DeprecationWarning)
  20     string_types = basestring,
  21     text_type = unicode
  22     integer_types = int, long
  23     zip_longest = itertools.izip_longest
  24     import ConfigParser as configparser
  25     from urlparse import urlparse
  26     from UserDict import UserDict
  27     from inspect import getargspec
  28     from collections import Iterable, Mapping
  29
  ```
  --- END FILES ---
  
  Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.
  
  Here is an example:
  
  ```diff
  diff --git a/examples/server_async.py b/examples/server_async.py
  --- a/examples/server_async.py
  +++ b/examples/server_async.py
  @@ -313,4 +313,4 @@
   
   
   if __name__ == "__main__":
  -    asyncio.run(run_async_server("."), debug=True)
  +    asyncio.run(run_async_server(), debug=True)
  diff --git a/examples/server_sync.py b/examples/server_sync.py
  --- a/examples/server_sync.py
  +++ b/examples/server_sync.py
  @@ -313,5 +313,5 @@
   
   
   if __name__ == "__main__":
  -    server = run_sync_server(".")
  +    server = run_sync_server()
       server.shutdown()
  
  ```
  
golden_diff: diff --git a/rasterio/compat.py b/rasterio/compat.py
  --- a/rasterio/compat.py
  +++ b/rasterio/compat.py
  @@ -26,3 +26,8 @@
       from UserDict import UserDict
       from inspect import getargspec
       from collections import Iterable, Mapping
  +
  +# Users can pass in objects that subclass a few different objects
  +# More specifically, rasterio has a CRS() class that subclasses UserDict()
  +# In Python 2 UserDict() is in its own module and does not subclass Mapping()
  +DICT_TYPES = (dict, Mapping, UserDict)
  
verification_info: {"golden_diff": "diff --git a/rasterio/compat.py b/rasterio/compat.py\n--- a/rasterio/compat.py\n+++ b/rasterio/compat.py\n@@ -26,3 +26,8 @@\n     from UserDict import UserDict\n     from inspect import getargspec\n     from collections import Iterable, Mapping\n+\n+# Users can pass in objects that subclass a few different objects\n+# More specifically, rasterio has a CRS() class that subclasses UserDict()\n+# In Python 2 UserDict() is in its own module and does not subclass Mapping()\n+DICT_TYPES = (dict, Mapping, UserDict)\n", "issue": "optimizing `transform_geom` for repeated transformations\nRelated to: https://github.com/Toblerity/Fiona/issues/799\r\n\r\nIs there interest in adding this to rasterio as well?\n", "before_files": [{"content": "\"\"\"Python 2-3 compatibility.\"\"\"\n\nimport itertools\nimport sys\nimport warnings\n\n\nif sys.version_info[0] >= 3:   # pragma: no cover\n    string_types = str,\n    text_type = str\n    integer_types = int,\n    zip_longest = itertools.zip_longest\n    import configparser\n    from urllib.parse import urlparse\n    from collections import UserDict\n    from collections.abc import Iterable, Mapping\n    from inspect import getfullargspec as getargspec\nelse:  # pragma: no cover\n    warnings.warn(\"Python 2 compatibility will be removed after version 1.1\", DeprecationWarning)\n    string_types = basestring,\n    text_type = unicode\n    integer_types = int, long\n    zip_longest = itertools.izip_longest\n    import ConfigParser as configparser\n    from urlparse import urlparse\n    from UserDict import UserDict\n    from inspect import getargspec\n    from collections import Iterable, Mapping\n", "path": "rasterio/compat.py"}], "after_files": [{"content": "\"\"\"Python 2-3 compatibility.\"\"\"\n\nimport itertools\nimport sys\nimport warnings\n\n\nif sys.version_info[0] >= 3:   # pragma: no cover\n    string_types = str,\n    text_type = str\n    integer_types = int,\n    zip_longest = itertools.zip_longest\n    import configparser\n    from urllib.parse import urlparse\n    from collections import UserDict\n    from collections.abc import Iterable, Mapping\n    from inspect import getfullargspec as getargspec\nelse:  # pragma: no cover\n    warnings.warn(\"Python 2 compatibility will be removed after version 1.1\", DeprecationWarning)\n    string_types = basestring,\n    text_type = unicode\n    integer_types = int, long\n    zip_longest = itertools.izip_longest\n    import ConfigParser as configparser\n    from urlparse import urlparse\n    from UserDict import UserDict\n    from inspect import getargspec\n    from collections import Iterable, Mapping\n\n# Users can pass in objects that subclass a few different objects\n# More specifically, rasterio has a CRS() class that subclasses UserDict()\n# In Python 2 UserDict() is in its own module and does not subclass Mapping()\nDICT_TYPES = (dict, Mapping, UserDict)\n", "path": "rasterio/compat.py"}]}