mapcidr uses too much RAM and crashes laptop

[aerosayan]

Describe the bug
echo 17.0.0.0/8 | mapcidr -silent uses up almost 1.5 GB RAM memory, and echo 17.0.0.0/2 | mapcidr -silent makes the computer unresponsive after consuming all of my 4 GB RAM. I'm submitting this as a bug report, since such high memory usage should have been documented well as a clear WARNING in the README.md, and even though I'm not very knowledgeable about mapcidr, I think such high memory requirement shouldn't be necessary for basic use as shown above.

Obviously some huge amount of dynamic memory allocation is happening inside the code.
Is that really required for expanding out the given input into IPs?
I would imagine it would be possible to simply print out the information directly without any memory allocation, or at least do it in batches so that memory requirement isn't so high.

Mapcidr version
v0.0.7

Complete command you used to reproduce this
echo 17.0.0.0/8 | mapcidr -silent and echo 17.0.0.0/2 | mapcidr -silent

[ehsandeep]

Hi @aerosayan, thanks for reporting this, High uses of memory was not intended as such we fixed this issue in linked PR.

[ehsandeep]

A new release is pushed for mapCIDR including fix for this issue.