How should this profiler report interpreted?

[scame]

I have a function which I use to process some files and it works
slowly with bigger files. I tried to profile it and I got this output.
Only the relevant part is shown:

 - save-excursion                                     9817  99%
  - insert                                               2   0%
   - jit-lock-after-change                               1   0%
    - run-hook-with-args                                 1   0%
       font-lock-extend-jit-lock-region-after-change     1   0%

Does this mean the save-excursion call itself consumes 99% of the CPU?