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New benchmarks for parsing dates with dayfirst=True and format='%d-%m-%Y' #26360

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Merged
merged 4 commits into from
May 14, 2019
Merged

New benchmarks for parsing dates with dayfirst=True and format='%d-%m-%Y' #26360

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dd369e0
added 'dayfirst' parameter to 'ReadCSVParseSpecialDate' benchmark
anmyachev May 12, 2019
3b1034b
added benchmark for 'to_datetime' function with '%d-%m-%Y' format
anmyachev May 12, 2019
31aa606
created 'ParseDateComparison' class for asv testing
anmyachev May 14, 2019
e33284d
rollback first benchmarks
anmyachev May 14, 2019
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rollback first benchmarks
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@anmyachev
anmyachev committed May 14, 2019
commit e33284d0f3db92d70854751e4b95b7ee507d1f15
10 changes: 5 additions & 5 deletions asv_bench/benchmarks/io/csv.py
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Original file line number Diff line number Diff line change
Expand Up @@ -272,22 +272,22 @@ def mem_parser_chunks(self):


class ReadCSVParseSpecialDate(StringIORewind):
params = (['mY', 'mdY', 'hm'], [False, True])
param_names = ['value', 'dayfirst']
params = (['mY', 'mdY', 'hm'],)
param_names = ['value']
objects = {
'mY': '01-2019\n10-2019\n02/2000\n',
'mdY': '12/02/2010\n',
'hm': '21:34\n'
}

def setup(self, value, dayfirst):
def setup(self, value):
count_elem = 10000
data = self.objects[value] * count_elem
self.StringIO_input = StringIO(data)

def time_read_special_date(self, value, dayfirst):
def time_read_special_date(self, value):
read_csv(self.data(self.StringIO_input), sep=',', header=None,
names=['Date'], parse_dates=['Date'], dayfirst=dayfirst)
names=['Date'], parse_dates=['Date'])


class ParseDateComparison(StringIORewind):
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6 changes: 1 addition & 5 deletions asv_bench/benchmarks/timeseries.py
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Expand Up @@ -354,19 +354,15 @@ def time_infer_quarter(self):
class ToDatetimeFormat:

def setup(self):
self.count = 100000
self.s = Series(['19MAY11', '19MAY11:00:00:00'] * self.count)
self.s = Series(['19MAY11', '19MAY11:00:00:00'] * 100000)
self.s2 = self.s.str.replace(':\\S+$', '')
self.s3 = Series(['02-11-2000'] * self.count)

def time_exact(self):
to_datetime(self.s2, format='%d%b%y')

def time_no_exact(self):
to_datetime(self.s, format='%d%b%y', exact=False)

def time_DDMMYYYY(self):
to_datetime(self.s3, format='%d-%m-%Y')

class ToDatetimeCache:

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