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author | Richard Purdie <richard.purdie@linuxfoundation.org> | 2015-12-20 13:22:19 +0000 |
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committer | Richard Purdie <richard.purdie@linuxfoundation.org> | 2015-12-22 00:01:57 +0000 |
commit | 98d7002d1dca4b62042e1589fd5b9b3805d57f7a (patch) | |
tree | 0d40f2935632917c47251a993194e9ffa02f38f6 /lib/bb/event.py | |
parent | e0f05871c2a6f1e86ae19ad343c7c6f822ddb67e (diff) | |
download | bitbake-98d7002d1dca4b62042e1589fd5b9b3805d57f7a.tar.gz |
event/utils/methodpool: Add a cache of compiled code objects
With the addition of function line number handling, the overhead of
the compile functions is no longer negligible. We tend to compile
the same pieces of code over and over again so wrapping a cache around
this is beneficial and removes the overhead of line numbered functions.
Life cycle of a cache using a global like this is in theory problematic
although in reality unlikely to be an issue. It can be dealt with
if/as/when we deal with the other global caches.
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'lib/bb/event.py')
-rw-r--r-- | lib/bb/event.py | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/lib/bb/event.py b/lib/bb/event.py index bd2b0a4b0..5ffe89eae 100644 --- a/lib/bb/event.py +++ b/lib/bb/event.py @@ -31,6 +31,7 @@ except ImportError: import logging import atexit import traceback +import ast import bb.utils import bb.compat import bb.exceptions @@ -189,13 +190,15 @@ def register(name, handler, mask=None, filename=None, lineno=None): if isinstance(handler, basestring): tmp = "def %s(e):\n%s" % (name, handler) try: - import ast - if filename is None: - filename = "%s(e)" % name - code = compile(tmp, filename, "exec", ast.PyCF_ONLY_AST) - if lineno is not None: - ast.increment_lineno(code, lineno-1) - code = compile(code, filename, "exec") + code = bb.methodpool.compile_cache(tmp) + if not code: + if filename is None: + filename = "%s(e)" % name + code = compile(tmp, filename, "exec", ast.PyCF_ONLY_AST) + if lineno is not None: + ast.increment_lineno(code, lineno-1) + code = compile(code, filename, "exec") + bb.methodpool.compile_cache_add(tmp, code) except SyntaxError: logger.error("Unable to register event handler '%s':\n%s", name, ''.join(traceback.format_exc(limit=0))) |