Different Engines in read_csv
import pandas as pd
FILEPATH = 'california_housing_train.csv'
%%timeit
df = pd.read_csv(FILEPATH, engine='c') #C engine offers speed
24.8 ms ± 6.24 ms per loop (mean ± std. dev. of 7 runs, 1 loop each)
%%timeit
df = pd.read_csv(FILEPATH, engine='python') #Python engine is more feature rich but slower
139 ms ± 25.4 ms per loop (mean ± std. dev. of 7 runs, 1 loop each)