diff --git a/GPU/Common/PostShader.cpp b/GPU/Common/PostShader.cpp
index 37066703e5..113aa662ac 100644
--- a/GPU/Common/PostShader.cpp
+++ b/GPU/Common/PostShader.cpp
@@ -225,7 +225,6 @@ void LoadPostShaderInfo(Draw::DrawContext *draw, const std::vector<Path> &direct
 		off.settings[i].maxValue = 1.0f;
 		off.settings[i].step = 0.01f;
 	}
-	shaderInfo.insert(shaderInfo.begin(), off);
 
 	TextureShaderInfo textureOff{};
 	textureOff.name = "Off";
@@ -233,6 +232,8 @@ void LoadPostShaderInfo(Draw::DrawContext *draw, const std::vector<Path> &direct
 	textureShaderInfo.insert(textureShaderInfo.begin(), textureOff);
 
 	// We always want the not visible ones at the end.  Makes menus easier.
+	shaderInfo.reserve(notVisible.size() + 1);
+	shaderInfo.insert(shaderInfo.begin(), off);
 	for (const auto &info : notVisible) {
 		appendShader(info);
 	}
diff --git a/GPU/Common/ReplacedTexture.cpp b/GPU/Common/ReplacedTexture.cpp
index 84fd0e2d93..b82aa88b4f 100644
--- a/GPU/Common/ReplacedTexture.cpp
+++ b/GPU/Common/ReplacedTexture.cpp
@@ -522,6 +522,7 @@ ReplacedTexture::LoadLevelResult ReplacedTexture::LoadLevelData(VFSFileReference
 		basist::ktx2_transcoder_state transcodeState;  // Each thread needs one of these.
 
 		transcoder.start_transcoding();
+		levels_.reserve(numMips);
 		for (int i = 0; i < numMips; i++) {
 			std::vector<uint8_t> &out = data_[mipLevel + i];
 
@@ -574,6 +575,7 @@ ReplacedTexture::LoadLevelResult ReplacedTexture::LoadLevelData(VFSFileReference
 		data_.resize(numMips);
 
 		// A DDS File can contain multiple mipmaps.
+		levels_.reserve(numMips);
 		for (int i = 0; i < numMips; i++) {
 			std::vector<uint8_t> &out = data_[mipLevel + i];
 
diff --git a/GPU/GLES/ShaderManagerGLES.cpp b/GPU/GLES/ShaderManagerGLES.cpp
index 176b50aa85..052a99bfca 100644
--- a/GPU/GLES/ShaderManagerGLES.cpp
+++ b/GPU/GLES/ShaderManagerGLES.cpp
@@ -1141,6 +1141,7 @@ bool ShaderManagerGLES::LoadCache(File::IOFile &f) {
 		}
 	}
 
+	linkedShaderCache_.reserve(pending.link.size() - pending.linkPos);
 	for (size_t &i = pending.linkPos; i < pending.link.size(); i++) {
 		const VShaderID &vsid = pending.link[i].first;
 		const FShaderID &fsid = pending.link[i].second;
diff --git a/GPU/GPUCommon.cpp b/GPU/GPUCommon.cpp
index e06b8390fd..2ee622d203 100644
--- a/GPU/GPUCommon.cpp
+++ b/GPU/GPUCommon.cpp
@@ -1606,6 +1606,7 @@ std::vector<GPUDebugOp> GPUCommon::DissassembleOpRange(u32 startpc, u32 endpc) {
 
 	// Don't trigger a pause.
 	u32 prev = Memory::IsValidAddress(startpc - 4) ? Memory::Read_U32(startpc - 4) : 0;
+	result.reserve((endpc - startpc) / 4);
 	for (u32 pc = startpc; pc < endpc; pc += 4) {
 		u32 op = Memory::IsValidAddress(pc) ? Memory::Read_U32(pc) : 0;
 		GeDisassembleOp(pc, op, prev, buffer, sizeof(buffer));