Monster Hunter Portable 3rd HD - JPN - NPJB40001

[gid15]

Code:

_S1_2_8876618 54,292,166,963 instructions (95.655%), 5,363 calls (08876618 - 08876640, length 11)
    08876618:[3C0308AB]: lui        $v1, 0x08AB <=> li $v1, 0x08AB0000
    0887661C:[90623664]: lbu        $v0, 13924($v1)
    08876620:[14400006]: bne        $v0, $zr, 0x0887663C
    08876624:[00000000]: nop
    08876628:[00000000]: nop
    0887662C:[00000000]: nop
    08876630:[90623664]: lbu        $v0, 13924($v1)
    08876634:[1040FFFC]: beq        $v0, $zr, 0x08876628
    08876638:[00000000]: nop
    0887663C:[03E00008]: jr         $ra
    08876640:[00000000]: nop

This game is spending 95% of its CPU time in such a simple polling loop. I've tried to improve it in r3173. Does it have an impact on the performance?