Takes too long for large data frames

[liuzj039]

Many thanks to the developer for providing a version of jupyterlab.

While using it, I found that tabnine is very time consuming for completing large data frames.

Here is an example.

df = pd.DataFrame([np.random.choice(['a', 'b', 'c'], 20000) for x in range(20)]).T
df.      # It will take more than 10 seconds before the complementary information is available