unconditionally use new_vmcmd(), not only in the DEBUG path
putting the function in a define is messy with no benefit

on mac mini m1, make -j8 build

before:
   72m17.76s real   313m01.65s user    73m46.92s system
after:
   72m11.49s real   313m00.97s user    74m37.44s system

Index: sys/sys/exec.h
===================================================================
RCS file: /cvs/src/sys/sys/exec.h,v
diff -u -p -r1.55 exec.h
--- sys/sys/exec.h	16 Oct 2024 18:47:48 -0000	1.55
+++ sys/sys/exec.h	1 Nov 2024 10:23:53 -0000
@@ -161,7 +161,6 @@ int	check_exec(struct proc *, struct exe
 int	exec_setup_stack(struct proc *, struct exec_package *);
 int	exec_process_vmcmds(struct proc *, struct exec_package *);
 
-#ifdef DEBUG
 void	new_vmcmd(struct exec_vmcmd_set *evsp,
 		    int (*proc)(struct proc *p, struct exec_vmcmd *),
 		    u_long len, u_long addr, struct vnode *vp, u_long offset,
@@ -170,25 +169,6 @@ void	new_vmcmd(struct exec_vmcmd_set *ev
 	new_vmcmd(evsp,proc,len,addr,vp,offset,prot, 0);
 #define NEW_VMCMD2(evsp,proc,len,addr,vp,offset,prot,flags) \
 	new_vmcmd(evsp,proc,len,addr,vp,offset,prot,flags)
-#else	/* DEBUG */
-#define NEW_VMCMD(evsp,proc,len,addr,vp,offset,prot) \
-	NEW_VMCMD2(evsp,proc,len,addr,vp,offset,prot,0)
-#define	NEW_VMCMD2(evsp,proc,len,addr,vp,offset,prot,flags) do { \
-	struct exec_vmcmd *__vcp; \
-	if ((evsp)->evs_used >= (evsp)->evs_cnt) \
-		vmcmdset_extend(evsp); \
-	__vcp = &(evsp)->evs_cmds[(evsp)->evs_used++]; \
-	__vcp->ev_proc = (proc); \
-	__vcp->ev_len = (len); \
-	__vcp->ev_addr = (addr); \
-	if ((__vcp->ev_vp = (vp)) != NULLVP) \
-		vref(vp); \
-	__vcp->ev_offset = (offset); \
-	__vcp->ev_prot = (prot); \
-	__vcp->ev_flags = (flags); \
-} while (0)
-
-#endif /* DEBUG */
 
 /* Initialize an empty vmcmd set */
 #define VMCMDSET_INIT(vmc) do { \
Index: sys/kern/exec_subr.c
===================================================================
RCS file: /cvs/src/sys/kern/exec_subr.c,v
diff -u -p -r1.67 exec_subr.c
--- sys/kern/exec_subr.c	2 Apr 2024 08:39:16 -0000	1.67
+++ sys/kern/exec_subr.c	1 Nov 2024 10:23:53 -0000
@@ -42,14 +42,11 @@
 
 #include <uvm/uvm_extern.h>
 
-#ifdef DEBUG
 /*
  * new_vmcmd():
  *	create a new vmcmd structure and fill in its fields based
  *	on function call arguments.  make sure objects ref'd by
  *	the vmcmd are 'held'.
- *
- * If not debugging, this is a macro, so it's expanded inline.
  */
 
 void
@@ -71,7 +68,6 @@ new_vmcmd(struct exec_vmcmd_set *evsp,
 	vcp->ev_prot = prot;
 	vcp->ev_flags = flags;
 }
-#endif /* DEBUG */
 
 void
 vmcmdset_extend(struct exec_vmcmd_set *evsp)