diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 0054445..d7e0a96 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -50,7 +50,7 @@ jobs:
 
           cp {README.md,UNLICENSE,LICENSE-MIT} "$staging/"
           cp {build.rs,Cargo.toml,Cargo.lock} "$staging/"
-          cp {pgo.sh,pgo_local.sh} "${staging}/"
+          cp justfile "$staging/"
           cp -R ./src "./$staging/src"
 
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 801d6be..cd854eb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## v0.5.2-alpha (in progress)
+
+- [PR24](https://github.com/sstadick/hck/pull/24) Removed the now defunct profile guided optimization shell scripts and all references to them in favor of the `justfile` that was added in `v0.5.0`
+
 ## v0.5.1
 
 - Fix the version in the binary to match the actual version
diff --git a/pgo.sh b/pgo.sh
deleted file mode 100644
index ef6b489..0000000
--- a/pgo.sh
+++ /dev/null
@@ -1,54 +0,0 @@
-# Try some profile guided optimiztion
-# https://doc.rust-lang.org/rustc/profile-guided-optimization.html
-# rustup component add llvm-tools-preview
-set -x
-
-# STEP 0: Make sure there is no left-over profiling data from previous runs
-cwd=$(pwd)
-rm -rf "$cwd"/pgo-data
-mkdir "$cwd"/pgo-data
-
-# Get 1_000_000 lines of wide csv file
-wget -q -S -O - https://archive.ics.uci.edu/ml/machine-learning-databases/00347/all_train.csv.gz \
-    | gunzip \
-    | head -n 1000000 \
-    > "$cwd"/pgo-data/data.csv
-
-data="./pgo-data/data.csv"
-spaced_data="./pgo-data/spaced_data.txt"
-llvm_profdata=$(find ~/.rustup/toolchains/stable-*/lib/rustlib/*/bin/ -name llvm-profdata -type f)
-
-# STEP 1: Build the instrumented binaries
-RUSTFLAGS="-Cprofile-generate=$cwd/pgo-data" \
-    cargo build --release --locked
-
-# STEP 2: Run the instrumented binaries with some typical data
-
-# single-byte in order
-./target/release/hck -Ld, -f1,8,19 "$data"  > /dev/null
-./target/release/hck -Ld, --no-mmap -f1,8,19 "$data"  > /dev/null
-
-# single byte reorder
-./target/release/hck -Ld, -f1,19,8 "$data" > /dev/null
-./target/release/hck -Ld, --no-mmap -f1,19,8 "$data" > /dev/null
-
-# single byte regex
-./target/release/hck -d, -f1,8,19 "$data" > /dev/null
-./target/release/hck -d, -f1,8,19 --no-mmap "$data" > /dev/null
-
-# make multi-space file
-./target/release/hck -Ld, -D '   ' -f1,8,19 "$data" > "$spaced_data"
-
-# multi byte regex
-./target/release/hck -d '\s+' -f1,8,19 "$spaced_data" > /dev/null
-./target/release/hck -d '\s+' --no-mmap -f1,8,19 "$spaced_data" > /dev/null
-
-rm "$spaced_data"
-rm "$data"
-
-# STEP 3: Merge the `.profraw` files into a `.profdata` file
-"$llvm_profdata" merge -o "$cwd"/pgo-data/merged.profdata "$cwd"/pgo-data
-
-# STEP 4: Use the `.profdata` file for guiding optimizations
-RUSTFLAGS="-Cllvm-args=-pgo-warn-missing-function -Cprofile-use=$cwd/pgo-data/merged.profdata" \
-    cargo build --release --locked
diff --git a/pgo_local.sh b/pgo_local.sh
deleted file mode 100644
index 7168a6f..0000000
--- a/pgo_local.sh
+++ /dev/null
@@ -1,59 +0,0 @@
-# Try some profile guided optimiztion
-# https://doc.rust-lang.org/rustc/profile-guided-optimization.html
-# rustup component add llvm-tools-preview
-set -x
-
-# STEP 0: Make sure there is no left-over profiling data from previous runs
-cwd=$(pwd)
-rm -rf "$cwd"/pgo-data
-mkdir "$cwd"/pgo-data
-
-# Get 1_000_000 lines of wide csv file
-wget -q -S -O - https://archive.ics.uci.edu/ml/machine-learning-databases/00347/all_train.csv.gz \
-    | gunzip \
-    | head -n 1000000 \
-    > "$cwd"/pgo-data/data.csv
-
-data="./pgo-data/data.csv"
-spaced_data="./pgo-data/spaced_data.txt"
-llvm_profdata=$(find ~/.rustup/toolchains/stable-*/lib/rustlib/*/bin/ -name llvm-profdata -type f)
-
-# STEP 1: Build the instrumented binaries
-RUSTFLAGS="-Cprofile-generate=$cwd/pgo-data" \
-    cargo build --release --locked
-
-# STEP 2: Run the instrumented binaries with some typical data
-
-# single-byte in order
-./target/release/hck -Ld, -f1,8,19 "$data"  > /dev/null
-./target/release/hck -Ld, --no-mmap -f1,8,19 "$data"  > /dev/null
-
-# single byte reorder
-./target/release/hck -Ld, -f1,19,8 "$data" > /dev/null
-./target/release/hck -Ld, --no-mmap -f1,19,8 "$data" > /dev/null
-
-# single byte regex
-./target/release/hck -d, -f1,8,19 "$data" > /dev/null
-./target/release/hck -d, -f1,8,19 --no-mmap "$data" > /dev/null
-
-# make multi-space file
-./target/release/hck -Ld, -D '   ' -f1,8,19 "$data" > "$spaced_data"
-
-# multi byte regex
-./target/release/hck -d '\s+' -f1,8,19 "$spaced_data" > /dev/null
-./target/release/hck -d '\s+' --no-mmap -f1,8,19 "$spaced_data" > /dev/null
-
-rm "$spaced_data"
-rm "$data"
-
-# STEP 3: Merge the `.profraw` files into a `.profdata` file
-"$llvm_profdata" merge -o "$cwd"/pgo-data/merged.profdata "$cwd"/pgo-data
-
-# STEP 4: Use the `.profdata` file for guiding optimizations
-
-# Local specific build build
-RUSTFLAGS="-Ctarget-cpu=native -Cllvm-args=-pgo-warn-missing-function -Cprofile-use=$cwd/pgo-data/merged.profdata" \
-    cargo build --release --locked
-
-# Create deb package
-# RUSTFLAGS="-Cllvm-args=-pgo-warn-missing-function -Cprofile-use=$cwd/pgo-data/merged.profdata" cargo deb