diff --git a/AxibugEmuOnline.Client/Assets/Plugins/Mame.Core/cpu/nec/Nec.cs b/AxibugEmuOnline.Client/Assets/Plugins/Mame.Core/cpu/nec/Nec.cs
index 731a3322..3a91ab2f 100644
--- a/AxibugEmuOnline.Client/Assets/Plugins/Mame.Core/cpu/nec/Nec.cs
+++ b/AxibugEmuOnline.Client/Assets/Plugins/Mame.Core/cpu/nec/Nec.cs
@@ -426,14 +426,17 @@ namespace cpu.nec
             I.regs.b[Reg * 2] = (byte)((ushort)tmp1 % 0x100);
             I.regs.b[Reg * 2 + 1] = (byte)((ushort)tmp1 / 0x100);
         }
+
+        static byte[] JMP_table = new byte[] { 3, 10, 10 };
         public void JMP(bool flag)
         {
             int tmp = (int)((sbyte)FETCH());
             if (flag)
             {
-                byte[] table = new byte[] { 3, 10, 10 };
+                //使用外部定义减少GC压力
+                //byte[] table = new byte[] { 3, 10, 10 };
                 I.ip = (ushort)(I.ip + tmp);
-                pendingCycles -= table[chip_type / 8];
+                pendingCycles -= JMP_table[chip_type / 8];
                 //PC = (I.sregs[1] << 4) + I.ip;
                 return;
             }
@@ -689,17 +692,20 @@ namespace cpu.nec
                 I.regs.b[5] = (byte)((ushort)result2 / 0x100);
             }
         }
+        static byte[] ADD4S_table = new byte[] { 18, 19, 19 };
         public void ADD4S(ref int tmp, ref int tmp2)
         {
             int i, v1, v2, result;
             int count = (I.regs.b[2] + 1) / 2;
             ushort di = (ushort)(I.regs.b[14] + I.regs.b[15] * 0x100);
             ushort si = (ushort)(I.regs.b[12] + I.regs.b[13] * 0x100);
-            byte[] table = new byte[] { 18, 19, 19 };
+
+            //使用外部定义减少GC压力
+            //byte[] table = new byte[] { 18, 19, 19 };
             I.ZeroVal = I.CarryVal = 0;
             for (i = 0; i < count; i++)
             {
-                pendingCycles -= table[chip_type / 8];
+                pendingCycles -= ADD4S_table[chip_type / 8];
                 tmp = GetMemB(3, si);
                 tmp2 = GetMemB(0, di);
                 v1 = (tmp >> 4) * 10 + (tmp & 0xf);
diff --git a/AxibugEmuOnline.Client/Assets/Plugins/Mame.Core/mame/igs011/IGS011.cs b/AxibugEmuOnline.Client/Assets/Plugins/Mame.Core/mame/igs011/IGS011.cs
index 516c44a6..d2089f65 100644
--- a/AxibugEmuOnline.Client/Assets/Plugins/Mame.Core/mame/igs011/IGS011.cs
+++ b/AxibugEmuOnline.Client/Assets/Plugins/Mame.Core/mame/igs011/IGS011.cs
@@ -199,16 +199,24 @@ namespace MAME.Core
         {
             igs_dips_sel = data;
         }
+        static byte[] igs_dips_r_dip = new byte[] { dsw1, dsw2, dsw3, dsw4, dsw5 };
         private static byte igs_dips_r(int num)
         {
             int i;
             byte ret = 0;
-            byte[] dip = new byte[] { dsw1, dsw2, dsw3, dsw4, dsw5 };
+
+            //使用外部定义减少GC压力(其实赋值也可以简化，TODO)
+            igs_dips_r_dip[0] = dsw1;
+            igs_dips_r_dip[1] = dsw2;
+            igs_dips_r_dip[2] = dsw3;
+            igs_dips_r_dip[0] = dsw4;
+            igs_dips_r_dip[0] = dsw5;
+            //byte[] dip = new byte[] { dsw1, dsw2, dsw3, dsw4, dsw5 };
             for (i = 0; i < num; i++)
             {
                 if (((~igs_dips_sel) & (1 << i)) != 0)
                 {
-                    ret = dip[i];
+                    ret = igs_dips_r_dip[i];
                 }
             }
             return ret;
diff --git a/AxibugEmuOnline.Client/Assets/Plugins/Mame.Core/mame/taito/Bublbobl.cs b/AxibugEmuOnline.Client/Assets/Plugins/Mame.Core/mame/taito/Bublbobl.cs
index 480e4919..360143be 100644
--- a/AxibugEmuOnline.Client/Assets/Plugins/Mame.Core/mame/taito/Bublbobl.cs
+++ b/AxibugEmuOnline.Client/Assets/Plugins/Mame.Core/mame/taito/Bublbobl.cs
@@ -139,9 +139,15 @@
         {
             return (byte)((port2_out & ddr2) | (port2_in & ~ddr2));
         }
+        static byte[] bublbobl_mcu_port2_w_ports = new byte[] { dsw0, dsw1, (byte)sbyte1, (byte)sbyte2 };
         public static void bublbobl_mcu_port2_w(byte data)
         {
-            byte[] ports = new byte[] { dsw0, dsw1, (byte)sbyte1, (byte)sbyte2 };
+            //使用外部定义减少GC压力
+            bublbobl_mcu_port2_w_ports[0] = dsw0;
+            bublbobl_mcu_port2_w_ports[1] = dsw1;
+            bublbobl_mcu_port2_w_ports[2] = (byte)sbyte1;
+            bublbobl_mcu_port2_w_ports[3] = (byte)sbyte2;
+            //byte[] ports = new byte[] { dsw0, dsw1, (byte)sbyte1, (byte)sbyte2 };
             if ((~port2_out & 0x10) != 0 && (data & 0x10) != 0)
             {
                 int address = port4_out | ((data & 0x0f) << 8);
@@ -149,7 +155,7 @@
                 {
                     if ((address & 0x0800) == 0x0000)
                     {
-                        port3_in = ports[address & 3];
+                        port3_in = bublbobl_mcu_port2_w_ports[address & 3];
                     }
                     else if ((address & 0x0c00) == 0x0c00)
                     {
@@ -332,9 +338,16 @@
         {
             return (byte)((portB_out & ddrB) | (portB_in & ~ddrB));
         }
+        static byte[] bublbobl_68705_portB_w_ports = new byte[] { dsw0, dsw1, (byte)sbyte1, (byte)sbyte2 };
         public static void bublbobl_68705_portB_w(byte data)
         {
-            byte[] ports = new byte[] { dsw0, dsw1, (byte)sbyte1, (byte)sbyte2 };
+
+            //使用外部定义减少GC压力
+            bublbobl_68705_portB_w_ports[0] = dsw0;
+            bublbobl_68705_portB_w_ports[1] = dsw1;
+            bublbobl_68705_portB_w_ports[2] = (byte)sbyte1;
+            bublbobl_68705_portB_w_ports[3] = (byte)sbyte2;
+            //byte[] ports = new byte[] { dsw0, dsw1, (byte)sbyte1, (byte)sbyte2 };
             if (((ddrB & 0x01) != 0) && ((~data & 0x01) != 0) && ((portB_out & 0x01) != 0))
             {
                 portA_in = (byte)latch;
@@ -353,7 +366,7 @@
                 {
                     if ((address & 0x0800) == 0x0000)
                     {
-                        latch = ports[address & 3];
+                        latch = bublbobl_68705_portB_w_ports[address & 3];
                     }
                     else if ((address & 0x0c00) == 0x0c00)
                     {