Performance impact

I notice a quite important impact on performance when I activate variable inspector.

Basically, some cells that should execute very quickly, hangs for 5-10 seconds before executing. I didn’t found any pattern though - it seems like it can randomly happen (quite often thought).

It seems that this is happening when there is a variable that’s a big list of strings and I open the variable inspector at least once. For instance, I do this dumb test:

toto = [] for i in range(500*1000): toto.append(100*str(i))

Then I have 10 cells below with: print(datetime.datetime.now())

that I execute quickly. Somewhere in the middle it will hang.

[lckr]

I managed to reproduce the issue. As far as I can say now, this delay is only noticeable when using large pd DataFrames. The issue is a filter operation in the kernel side code which uses the string representation of an object to determine if an object should be shown in the inspector or not. Unsuprisingly, this is very inperformant for larger dataframes.

A fix should be ready tomorrow.

[lckr]

Hey, I just merged a fix into the master. According to my tests, this should solve the issue with dataframes. If you encounter further slow downs, please let me know.