old_contents: import os
  import sys
  
  from _pydevd_bundle.pydevd_constants import IS_PYCHARM
  
  IS_PY36_OR_GREATER = sys.version_info >= (3, 6)
  
  frame_eval_func = None
  stop_frame_eval = None
  enable_cache_frames_without_breaks = None
  dummy_trace_dispatch = None
  show_frame_eval_warning = False
  
  # "NO" means we should not use frame evaluation, anything else means we should use it.
  USE_FRAME_EVAL = os.environ.get('PYDEVD_USE_FRAME_EVAL', None)
  
  if USE_FRAME_EVAL == 'NO':
      frame_eval_func, stop_frame_eval = None, None
  
  else:
      if IS_PY36_OR_GREATER:
          try:
              from _pydevd_frame_eval.pydevd_frame_eval_cython_wrapper import frame_eval_func, stop_frame_eval, enable_cache_frames_without_breaks, \
                  dummy_trace_dispatch
          except ImportError:
              from _pydev_bundle.pydev_monkey import log_error_once
  
              dirname = os.path.dirname(os.path.dirname(__file__))
  
              if not IS_PYCHARM:
                  log_error_once("warning: Debugger speedups using cython not found. Run '\"%s\" \"%s\" build_ext --inplace' to build." % (
                      sys.executable, os.path.join(dirname, 'setup_cython.py')))
              else:
                  show_frame_eval_warning = True
  
new_contents: import os
  import sys
  
  from _pydevd_bundle.pydevd_constants import IS_PYCHARM
  
  IS_PY36_OR_GREATER = sys.version_info >= (3, 6)
  
  frame_eval_func = None
  stop_frame_eval = None
  enable_cache_frames_without_breaks = None
  dummy_trace_dispatch = None
  show_frame_eval_warning = False
  
  # "NO" means we should not use frame evaluation, anything else means we should use it.
  USE_FRAME_EVAL = os.environ.get('PYDEVD_USE_FRAME_EVAL', 'NO')
  
  if USE_FRAME_EVAL == 'NO':
      frame_eval_func, stop_frame_eval = None, None
  
  else:
      if IS_PY36_OR_GREATER:
          try:
              from _pydevd_frame_eval.pydevd_frame_eval_cython_wrapper import frame_eval_func, stop_frame_eval, enable_cache_frames_without_breaks, \
                  dummy_trace_dispatch
          except ImportError:
              from _pydev_bundle.pydev_monkey import log_error_once
  
              dirname = os.path.dirname(os.path.dirname(__file__))
  
              if not IS_PYCHARM:
                  log_error_once("warning: Debugger speedups using cython not found. Run '\"%s\" \"%s\" build_ext --inplace' to build." % (
                      sys.executable, os.path.join(dirname, 'setup_cython.py')))
              else:
                  show_frame_eval_warning = True
  
subject: disable frame evaluation by default