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Save huge amounts of memory by never caching the message and interning data for the other columns

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René Stadler 2007-11-15 17:54:30 +02:00 committed by Stefan Sauer
parent b3f21b5a59
commit 109cc29ed9
2 changed files with 25 additions and 12 deletions
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2
debug-viewer/GstDebugViewer/Data.py
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@ -124,7 +124,7 @@ def default_log_line_regex_ ():
OBJECT = "(?:<([^>]+)>)?"
MESSAGE = " (.+)"
expressions = [CATEGORY, FILENAME, LINE, FUNCTION, OBJECT, MESSAGE]
expressions = [CATEGORY, FILENAME, LINE, FUNCTION, OBJECT]
# New log format:
## expressions = [TIME, PID, THREAD, LEVEL, CATEGORY, FILENAME, LINE, FUNCTION,
## OBJECT, MESSAGE]

35
debug-viewer/GstDebugViewer/GUI.py
View file

@ -79,6 +79,10 @@ class LogModelBase (gtk.GenericTreeModel):
raise NotImplementedError ("derived classes must override this method")
def access_offset (self, offset):
raise NotImplementedError ("derived classes must override this method")
def iter_rows_offset (self):
for offset in self.line_offsets:
@ -131,7 +135,12 @@ class LogModelBase (gtk.GenericTreeModel):
line_offset = self.line_offsets[line_index]
self.ensure_cached (line_offset)
return self.line_cache[line_offset][col_id]
value = self.line_cache[line_offset][col_id]
if col_id == self.COL_MESSAGE:
message_offset = value
value = self.access_offset (line_offset + message_offset).strip ()
return value
def on_iter_next (self, line_index):
@ -198,6 +207,11 @@ class LazyLogModel (LogModelBase):
self.line_cache.clear ()
self.line_offsets = log_obj.line_cache.offsets
def access_offset (self, offset):
self.__fileobj.seek (offset)
return self.__fileobj.readline ()
def ensure_cached (self, line_offset):
if line_offset in self.line_cache:
@ -240,14 +254,16 @@ class LazyLogModel (LogModelBase):
if match is None:
# FIXME?
groups = [0, 0, 0, Data.DebugLevelNone, "", "", 0, "", "", line[ts_len:-len (os.linesep)]]
groups = [0, 0, 0, Data.DebugLevelNone, "", "", 0, "", "", ts_len]
else:
groups = [ts, pid, thread, level] + list (match.groups ())
groups = [ts, pid, thread, level] + list (match.groups ()) + [match.end ()]
# TODO: Figure out how much string interning can save here and how
# much run time speed it costs!
for col_id in (self.COL_CATEGORY, self.COL_FILENAME, self.COL_FUNCTION,
self.COL_OBJECT,):
groups[col_id] = intern (groups[col_id] or "")
groups[6] = int (groups[6]) # line
groups[8] = groups[8] or "" # object (optional)
# groups[8] = groups[8] or "" # object (optional)
self.line_cache[line_offset] = groups
@ -258,15 +274,12 @@ class FilteredLogModel (LogModelBase):
LogModelBase.__init__ (self)
self.parent_model = lazy_log_model
##self.ensure_cached = lazy_log_model.ensure_cached
self.access_offset = lazy_log_model.access_offset
self.ensure_cached = lazy_log_model.ensure_cached
self.line_cache = lazy_log_model.line_cache
self.line_offsets += lazy_log_model.line_offsets
def ensure_cached (self, line_offset):
return self.parent_model.ensure_cached (line_offset)
def add_filter (self, filter):
func = filter.filter_func