--- a/src/eric7/DebugClients/Python/coverage/pytracer.py Wed Jul 20 16:03:55 2022 +0200
+++ b/src/eric7/DebugClients/Python/coverage/pytracer.py Wed Jul 20 16:13:29 2022 +0200
@@ -67,6 +67,10 @@
# On exit, self.in_atexit = True
atexit.register(setattr, self, 'in_atexit', True)
+ # Cache a bound method on the instance, so that we don't have to
+ # re-create a bound method object all the time.
+ self._cached_bound_method_trace = self._trace
+
def __repr__(self):
return "<PyTracer at 0x{:x}: {} lines in {} files>".format(
id(self),
@@ -105,7 +109,7 @@
#self.log(":", frame.f_code.co_filename, frame.f_lineno, frame.f_code.co_name + "()", event)
- if (self.stopped and sys.gettrace() == self._trace): # pylint: disable=comparison-with-callable
+ if (self.stopped and sys.gettrace() == self._cached_bound_method_trace): # pylint: disable=comparison-with-callable
# The PyTrace.stop() method has been called, possibly by another
# thread, let's deactivate ourselves now.
if 0:
@@ -129,12 +133,13 @@
context_maybe = self.should_start_context(frame)
if context_maybe is not None:
self.context = context_maybe
- self.started_context = True
+ started_context = True
self.switch_context(self.context)
else:
- self.started_context = False
+ started_context = False
else:
- self.started_context = False
+ started_context = False
+ self.started_context = started_context
# Entering a new frame. Decide if we should trace in this file.
self._activity = True
@@ -143,22 +148,35 @@
self.cur_file_data,
self.cur_file_name,
self.last_line,
- self.started_context,
+ started_context,
)
)
- filename = frame.f_code.co_filename
- self.cur_file_name = filename
- disp = self.should_trace_cache.get(filename)
- if disp is None:
- disp = self.should_trace(filename, frame)
- self.should_trace_cache[filename] = disp
- self.cur_file_data = None
- if disp.trace:
- tracename = disp.source_filename
- if tracename not in self.data:
- self.data[tracename] = set()
- self.cur_file_data = self.data[tracename]
+ # Improve tracing performance: when calling a function, both caller
+ # and callee are often within the same file. if that's the case, we
+ # don't have to re-check whether to trace the corresponding
+ # function (which is a little bit espensive since it involves
+ # dictionary lookups). This optimization is only correct if we
+ # didn't start a context.
+ filename = frame.f_code.co_filename
+ if filename != self.cur_file_name or started_context:
+ self.cur_file_name = filename
+ disp = self.should_trace_cache.get(filename)
+ if disp is None:
+ disp = self.should_trace(filename, frame)
+ self.should_trace_cache[filename] = disp
+
+ self.cur_file_data = None
+ if disp.trace:
+ tracename = disp.source_filename
+ if tracename not in self.data:
+ self.data[tracename] = set()
+ self.cur_file_data = self.data[tracename]
+ else:
+ frame.f_trace_lines = False
+ elif not self.cur_file_data:
+ frame.f_trace_lines = False
+
# The call event is really a "start frame" event, and happens for
# function calls and re-entering generators. The f_lasti field is
# -1 for calls, and a real offset for generators. Use <0 as the
@@ -174,6 +192,7 @@
self.last_line = -frame.f_code.co_firstlineno
else:
self.last_line = frame.f_lineno
+
elif event == 'line':
# Record an executed line.
if self.cur_file_data is not None:
@@ -184,6 +203,7 @@
else:
self.cur_file_data.add(lineno)
self.last_line = lineno
+
elif event == 'return':
if self.trace_arcs and self.cur_file_data:
# Record an arc leaving the function, but beware that a
@@ -211,6 +231,7 @@
if real_return:
first = frame.f_code.co_firstlineno
self.cur_file_data.add((self.last_line, -first))
+
# Leaving this function, pop the filename stack.
self.cur_file_data, self.cur_file_name, self.last_line, self.started_context = (
self.data_stack.pop()
@@ -219,7 +240,7 @@
if self.started_context:
self.context = None
self.switch_context(None)
- return self._trace
+ return self._cached_bound_method_trace
def start(self):
"""Start this Tracer.
@@ -237,10 +258,10 @@
# function, but we are marked as running again, so maybe it
# will be ok?
#self.log("~", "starting on different threads")
- return self._trace
+ return self._cached_bound_method_trace
- sys.settrace(self._trace)
- return self._trace
+ sys.settrace(self._cached_bound_method_trace)
+ return self._cached_bound_method_trace
def stop(self):
"""Stop this Tracer."""
@@ -265,9 +286,10 @@
# so don't warn if we are in atexit on PyPy and the trace function
# has changed to None.
dont_warn = (env.PYPY and env.PYPYVERSION >= (5, 4) and self.in_atexit and tf is None)
- if (not dont_warn) and tf != self._trace: # pylint: disable=comparison-with-callable
+ if (not dont_warn) and tf != self._cached_bound_method_trace: # pylint: disable=comparison-with-callable
self.warn(
- f"Trace function changed, data is likely wrong: {tf!r} != {self._trace!r}",
+ "Trace function changed, data is likely wrong: " +
+ f"{tf!r} != {self._cached_bound_method_trace!r}",
slug="trace-changed",
)
