A lean way for getting the size of the instruction at a given address

hi

I need to get the size of the instruction at a given address. I am 
currently using gdb_insn_length (struct gdbarch *gdbarch, CORE_ADDR 
addr) which calls gdb_print_insn (struct gdbarch *gdbarch, CORE_ADDR 
memaddr, struct ui_file *stream, int *branch_delay_insns). and this is 
consuming a huge time, considering that this is used in branch tracing 
and this gets repeated up to few millions times.


Is there a lean way for getting the size of the instruction at a given 
address, I am using it for aarch64 and arm targets.

Kind Regards

Zied Guermazi