GSVA package normalization on gene-length ?

Question

[xanthexu]

Hi, I am trying to understand the difference of GSVA output from different normalization method. For example, both logCPM and logTPM is accepted with kcdf="Gaussian". Hover, TPM has normalized gene length while CPM hasn't . I am not sure if this will cause any difference in terms of the output result. Really appreciate if someone could help with the problem. Thanks in advance.