In some cases compilation is unreasonably slow.
For exmaple, simple compilation of the file attached takes about 650 times more than required by gcc:
> time icc ibm2.c
> time gcc ibm2.c
This is the latest (11.1.072) version of icc for Linux (64 bit)
> icc -V
Intel C Intel 64 Compiler Professional for applications running on Intel 64, Version 11.1 Build 20100414 Package ID: l_cproc_p_11.1.072
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FOR NON-COMMERCIAL USE ONLY