From 5e3426d0d26bb25810aca6593416ac0125ea6e8f Mon Sep 17 00:00:00 2001
From: Nebuleon Fumika
Date: Wed, 6 Feb 2013 19:07:39 -0500
Subject: Remove 320 KiB of memory allocations in APU emulation that were
 completely unused but constantly re-zeroed.

Frees up 320 KiB for other uses, and saves ~4 milliseconds at emulator startup, when resetting the APU and when loading a new game.
---
 source/apu.cpp | 19 +------------------
 1 file changed, 1 insertion(+), 18 deletions(-)

(limited to 'source/apu.cpp')

diff --git a/source/apu.cpp b/source/apu.cpp
index d60cc75..769d2bc 100644
--- a/source/apu.cpp
+++ b/source/apu.cpp
@@ -116,18 +116,14 @@ void S9xTraceSoundDSP (const char *s, int i1 = 0, int i2 = 0, int i3 = 0,
 bool8 S9xInitAPU ()
 {
     IAPU.RAM = (uint8 *) malloc (0x10000);
-    IAPU.ShadowRAM = (uint8 *) malloc (0x10000);
-    IAPU.CachedSamples = (uint8 *) malloc (0x40000);
     
-    if (!IAPU.RAM || !IAPU.ShadowRAM || !IAPU.CachedSamples)
+    if (!IAPU.RAM)
     {
 		S9xDeinitAPU ();
 		return (FALSE);
     }
 
 	memset(IAPU.RAM, 0, 0x10000);
-	memset(IAPU.ShadowRAM, 0, 0x10000);
-	memset(IAPU.CachedSamples, 0, 0x40000);
 	
     return (TRUE);
 }
@@ -139,16 +135,6 @@ void S9xDeinitAPU ()
 		free ((char *) IAPU.RAM);
 		IAPU.RAM = NULL;
     }
-    if (IAPU.ShadowRAM)
-    {
-		free ((char *) IAPU.ShadowRAM);
-		IAPU.ShadowRAM = NULL;
-    }
-    if (IAPU.CachedSamples)
-    {
-		free ((char *) IAPU.CachedSamples);
-		IAPU.CachedSamples = NULL;
-    }
 }
 
 EXTERN_C uint8 APUROM [64];
@@ -171,10 +157,7 @@ void S9xResetAPU ()
 	{
 		memcpy(IAPU.RAM+(i<<8), IAPU.RAM, 0x100);
 	}
-
-    memcpy (IAPU.ShadowRAM, IAPU.RAM, 0x10000);
 	
-    ZeroMemory (IAPU.CachedSamples, 0x40000);
     ZeroMemory (APU.OutPorts, 4);
     IAPU.DirectPage = IAPU.RAM;
     // memmove converted: Different mallocs [Neb]
-- 
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