diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index ad60c78..7e24a5f 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -21,7 +21,7 @@ jobs:
       - name: Build artifacts
         run: |
           docker run --rm -v ${PWD}:/project builder python3 grabTitles.py
-          docker run --rm -v ${PWD}:/project builder go build cmd/WiiUDownloader/main.go cmd/WiiUDownloader/darkMode.go cmd/WiiUDownloader/mainwindow.go cmd/WiiUDownloader/progressWindow.go cmd/WiiUDownloader/utils.go
+          docker run --rm -v ${PWD}:/project builder go build -pgo=auto cmd/WiiUDownloader/main.go cmd/WiiUDownloader/darkMode.go cmd/WiiUDownloader/mainwindow.go cmd/WiiUDownloader/progressWindow.go cmd/WiiUDownloader/utils.go
       - name: Deploy WiiUDownloader
         run: |
           mv main WiiUDownloader
diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index dbc36ba..0ba2e0e 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -21,7 +21,7 @@ jobs:
       - name: Build
         run: |
           python3 grabTitles.py
-          go build cmd/WiiUDownloader/main.go cmd/WiiUDownloader/darkMode.go cmd/WiiUDownloader/mainwindow.go cmd/WiiUDownloader/progressWindow.go cmd/WiiUDownloader/utils.go
+          go build -pgo=auto cmd/WiiUDownloader/main.go cmd/WiiUDownloader/darkMode.go cmd/WiiUDownloader/mainwindow.go cmd/WiiUDownloader/progressWindow.go cmd/WiiUDownloader/utils.go
       - name: Package
         run: |
           python3 data/create_bundle.py
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 46c6812..115b3aa 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -29,7 +29,7 @@ jobs:
       - name: Build
         run: |
           python3 grabTitles.py
-          go build -ldflags -H=windowsgui cmd/WiiUDownloader/main.go cmd/WiiUDownloader/darkMode.go cmd/WiiUDownloader/mainwindow.go cmd/WiiUDownloader/progressWindow.go cmd/WiiUDownloader/utils.go
+          go build -pgo=auto -ldflags -H=windowsgui cmd/WiiUDownloader/main.go cmd/WiiUDownloader/darkMode.go cmd/WiiUDownloader/mainwindow.go cmd/WiiUDownloader/progressWindow.go cmd/WiiUDownloader/utils.go
       - name: Deploy WiiUDownloader
         run: |
           mkdir dist
diff --git a/Dockerfile.linux b/Dockerfile.linux
index 1d6dbf9..137b070 100644
--- a/Dockerfile.linux
+++ b/Dockerfile.linux
@@ -1,6 +1,9 @@
 FROM ubuntu:22.04
 
-ARG DEBIAN_FRONTEND=noninteractive
+ENV DEBIAN_FRONTEND=noninteractive \
+ GOROOT=/usr/local/go \
+ GOPATH=$HOME/go \
+ PATH=$GOPATH/bin:$GOROOT/bin:$PATH
 
 RUN mkdir -p /usr/share/man/man1 /usr/share/man/man2 && \
     apt -y --no-install-recommends update && \
@@ -12,7 +15,10 @@ RUN mkdir -p /usr/share/man/man1 /usr/share/man/man2 && \
 
 RUN apt-fast -y --no-install-recommends update && \
     apt-fast -y --no-install-recommends upgrade && \
-    apt-fast install -y --no-install-recommends build-essential libgcrypt20-dev libgtk-3-dev libfuse2 libtool librsvg2-dev golang-go && \
+    apt-fast install -y --no-install-recommends build-essential libgcrypt20-dev libgtk-3-dev libfuse2 libtool librsvg2-dev && \
+    wget https://go.dev/dl/go1.21.1.linux-amd64.tar.gz && \
+    tar -xvf go1.21.1.linux-amd64.tar.gz && \
+    mv go /usr/local && \
     LINUXDEPLOY="/usr/bin/linuxdeploy.AppImage" && \
     LINUXDEPLOY_PLUGIN_GTK="/usr/bin/linuxdeploy-plugin-gtk.sh" && \
     LINUXDEPLOY_PLUGIN_CHECKRT="/usr/bin/linuxdeploy-plugin-checkrt.sh" && \
diff --git a/default.pgo b/default.pgo
new file mode 100644
index 0000000..a219e29
Binary files /dev/null and b/default.pgo differ
diff --git a/grabTitles.py b/grabTitles.py
index 3f5a8af..a39aff7 100644
--- a/grabTitles.py
+++ b/grabTitles.py
@@ -22,13 +22,13 @@ urllib.request.install_opener(opener)
 
 checkAndDeleteFile("gtitles/gtitles.c")
 urllib.request.urlretrieve("https://napi.nbg01.v10lator.de/db", "gtitles/gtitles.c")
-os.system("gcc -c -Wall -fpic -Igtitles -o gtitles/gtitles.o gtitles/gtitles.c")
+os.system("gcc -c -Wall -fpic -Ofast -flto=auto -pipe -Igtitles -o gtitles/gtitles.o gtitles/gtitles.c")
 os.system("ar rcs libgtitles.a gtitles/gtitles.o")
 os.system("gcc -shared -o gtitles/libgtitles.so gtitles/gtitles.o")
 
-os.system("gcc -c -Wall -fpic -O2 -UNDEBUG -DAES_ROM_TABLES -D_GNU_SOURCE -Icdecrypt -o cdecrypt/aes.o cdecrypt/aes.c")
-os.system("gcc -c -Wall -fpic -O2 -UNDEBUG -DAES_ROM_TABLES -D_GNU_SOURCE -Icdecrypt -o cdecrypt/cdecrypt.o cdecrypt/cdecrypt.c")
-os.system("gcc -c -Wall -fpic -O2 -UNDEBUG -DAES_ROM_TABLES -D_GNU_SOURCE -Icdecrypt -o cdecrypt/sha1.o cdecrypt/sha1.c")
-os.system("gcc -c -Wall -fpic -O2 -UNDEBUG -DAES_ROM_TABLES -D_GNU_SOURCE -Icdecrypt -o cdecrypt/util.o cdecrypt/util.c")
+os.system("gcc -c -Wall -fpic -Ofast -flto=auto -pipe -UNDEBUG -DAES_ROM_TABLES -D_GNU_SOURCE -Icdecrypt -o cdecrypt/aes.o cdecrypt/aes.c")
+os.system("gcc -c -Wall -fpic -Ofast -flto=auto -pipe -UNDEBUG -DAES_ROM_TABLES -D_GNU_SOURCE -Icdecrypt -o cdecrypt/cdecrypt.o cdecrypt/cdecrypt.c")
+os.system("gcc -c -Wall -fpic -Ofast -flto=auto -pipe -UNDEBUG -DAES_ROM_TABLES -D_GNU_SOURCE -Icdecrypt -o cdecrypt/sha1.o cdecrypt/sha1.c")
+os.system("gcc -c -Wall -fpic -Ofast -flto=auto -pipe -UNDEBUG -DAES_ROM_TABLES -D_GNU_SOURCE -Icdecrypt -o cdecrypt/util.o cdecrypt/util.c")
 os.system("ar rcs libcdecrypt.a cdecrypt/*.o")
 os.system("gcc -shared -o cdecrypt/libcdecrypt.so cdecrypt/*.o")