Question about bignum usage

[Gerd Möllmann]

In the igc branch, I see that Emacs creates bigints in an rate that I
find astonishsing, thousands in a few minutes. Most backtraces look like
this.

  * frame #0: 0x00000001000f9ce8 emacs`make_integer_mpz [inlined] 
make_bignum_bits(bits=71) at bignum.c:99:7 [opt]
    frame #1: 0x00000001000f9ce8 emacs`make_integer_mpz at bignum.c:170:10 [opt]
    frame #2: 0x00000001001beb48 
emacs`decode_time_components(form=TIMEFORM_HI_LO_US_PS, high=<unavailable>, 
low=<unavailable>, usec=<unavailable>, psec=<unavailable>, 
result=0x000000016fdfde50, dresult=0x0000000000000000) at timefns.c:812:27 [opt]
    frame #3: 0x00000001001be7e4 emacs`list4_to_timespec(high=<unavailable>, 
low=<unavailable>, usec=<unavailable>, psec=<unavailable>, 
result=0x000000016fdfdec0) at timefns.c:1008:7 [opt]
    frame #4: 0x00000001000e1c98 emacs`timer_check [inlined] 
decode_timer(timer=(struct Lisp_Vector *) $2 = 0x000000010ab42538, 
result=0x000000016fdfdec0) at keyboard.c:4648:10 [opt]
    frame #5: 0x00000001000e1c54 emacs`timer_check at keyboard.c:4713:10 [opt]
    frame #6: 0x00000001000e1b44 emacs`timer_check at keyboard.c:4856:18 [opt]
    frame #7: 0x00000001000df51c emacs`detect_input_pending_run_timers 
[inlined] readable_events(flags=1) at keyboard.c:3577:5 [opt]
    frame #8: 0x00000001000df518 emacs`detect_input_pending_run_timers 
[inlined] get_input_pending(flags=1) at keyboard.c:7859:42 [opt]
    frame #9: 0x00000001000df508 
emacs`detect_input_pending_run_timers(do_display=true) at keyboard.c:11563:5 
[opt]

Is this expected?