PERF: provide additional type information to compiler in maybe_convert_objects (#24647)

Author: qwhelan

asv_bench/benchmarks/ctors.py

@@ -41,7 +41,7 @@ def list_of_lists_with_none(arr):
 
 class SeriesConstructors(object):
 
- param_names = ["data_fmt", "with_index"]
+ param_names = ["data_fmt", "with_index", "dtype"]
  params = [[no_change,
  list,
  list_of_str,
@@ -52,15 +52,19 @@ class SeriesConstructors(object):
  list_of_lists,
  list_of_tuples_with_none,
  list_of_lists_with_none],
- [False, True]]
+ [False, True],
+ ['float', 'int']]
 
- def setup(self, data_fmt, with_index):
+ def setup(self, data_fmt, with_index, dtype):
  N = 10**4
- arr = np.random.randn(N)
+ if dtype == 'float':
+ arr = np.random.randn(N)
+ else:
+ arr = np.arange(N)
  self.data = data_fmt(arr)
  self.index = np.arange(N) if with_index else None
 
- def time_series_constructor(self, data_fmt, with_index):
+ def time_series_constructor(self, data_fmt, with_index, dtype):
  Series(self.data, index=self.index)
 
 

pandas/_libs/lib.pyx

@@ -2011,7 +2011,8 @@ def maybe_convert_objects(ndarray[object] objects, bint try_float=0,
  floats[i] = <float64_t>val
  complexes[i] = <double complex>val
  if not seen.null_:
- seen.saw_int(int(val))
+ val = int(val)
+ seen.saw_int(val)
 
  if ((seen.uint_ and seen.sint_) or
  val > oUINT64_MAX or val < oINT64_MIN):