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@markshannon
Last active September 15, 2023 14:03
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import timeit
import sys
def foo():
for i in range(100_000):
if i == 50_000:
pass # Put breakpoint here
print("No debug")
print(timeit.timeit(foo, number = 100))
DEBUGGER_ID = 0
if sys.version_info.minor >= 12:
print("PEP 669")
break_count = 0
def pep_669_breakpoint(code, line):
global break_count
if line == 7:
break_count += 1
else:
return sys.monitoring.DISABLE
sys.monitoring.register_callback(DEBUGGER_ID, sys.monitoring.events.LINE, pep_669_breakpoint)
sys.monitoring.set_local_events(foo.__code__, DEBUGGER_ID, sys.monitoring.events.LINE)
print(timeit.timeit(foo, number = 100))
sys.monitoring.set_local_events(foo.__code__, DEBUGGER_ID, 0)
print("Break point hit", break_count, "times")
break_count = 0
#Use sys.settrace, this is about as fast as a sys.settrace debugger can be if written in Python.
print("sys.settrace")
foo_code = foo.__code__
def sys_settrace_breakpoint(frame, event, arg):
global break_count
if frame.f_code is not foo_code:
return None
if event == "line" and frame.f_lineno == 7:
break_count += 1
return sys_settrace_breakpoint
sys.settrace(sys_settrace_breakpoint)
print(timeit.timeit(foo, number = 100))
sys.settrace(None)
print("Break point hit", break_count, "times")
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