Hi, Sergey! Thanks for the patch! LGTM -- Best regards, Maxim Kokryashkin     >  >>When the profiling interval is parsed, `tvisnum()` is used to check that >>the given value is a number. But in case of dual-number mode this check >>returns false as far as the given value is an integer, so `tvisnumber()` >>should be used to cover both cases. >>--- >> src/lib_misc.c | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >>diff --git a/src/lib_misc.c b/src/lib_misc.c >>index 06fb9f9f..c18d297e 100644 >>--- a/src/lib_misc.c >>+++ b/src/lib_misc.c >>@@ -209,7 +209,7 @@ static int parse_sysprof_opts(lua_State *L, struct luam_Sysprof_Options *opt, in >>   { >>     cTValue *interval = lj_tab_getstr(options, lj_str_newlit(L, "interval")); >>     opt->interval = SYSPROF_DEFAULT_INTERVAL; >>- if (interval && tvisnum(interval)) { >>+ if (interval && tvisnumber(interval)) { >>       int32_t signed_interval = numberVint(interval); >>       if (signed_interval < 1) >>         return PROFILE_ERRUSE; >>-- >>2.34.1 >