Avoid multiple memory access in print_proc_time

For nano sec, sec and min printing

wtfstopw.asm

 	sub qword [ts_cur.tv_sec], 1
 	print_time_us_cont:
 
-	; set the nanosec chars (time_res chars) in timestr
 	xor rdx, rdx
 	div qword [ts_sleep.tv_nsec] ; Divide result given time_res
-	mov rdi, timestr + 6
-	mov rsi, rdi ; rsi points on 1st nanosec digit
-	add rdi, [time_res] ; rdi points on last nanosec digit
+
+	; set the nanosec chars (time_res chars) in timestr
+	mov rbx, 0x2020202020202020
+	mov rcx, [time_res]
 	mov r8, 10
-	print_time_us_loop:
+	procpt_loopns:
 		xor rdx, rdx
 		div r8
-		xchg al, dl
-		add al, 0x30
-		stosb
-		mov al, dl
-		cmp rsi, rdi
-		loopne print_time_us_loop
+		add dl, '0'
+		shl rbx, 8
+		mov bl, dl
+		loop procpt_loopns
+	mov [timestr+7], rbx
 
 	; filling timestr with seconds & minutes chars
 	mov rax, [ts_cur.tv_sec]
 
 	xor rdx, rdx
 	div r8
-	add dl, 0x30
-	mov byte [timestr + 5], dl
-
+	mov bh, dl
 	xor dl, dl
 	div r9
-	add dl, 0x30
-	mov byte [timestr + 4], dl
+	mov bl, dl
+	add bx, 0x3030
+	mov word [timestr + 4], bx
 
 	xor dl, dl
 	div r8
-	add dl, 0x30
-	mov byte [timestr + 2], dl
-
+	mov bh, dl
 	xor dl, dl
 	div r9
-	add dl, 0x30
-	mov byte[timestr + 1], dl
+	mov bl, dl
+	add bx, 0x3030
+	mov word [timestr + 1], bx
 
 	; filling the hours buffer
 	; rcx will contain max_digits - digits_count