diff --git a/Cargo.lock b/Cargo.lock
index 7f91d12a419c1..793868a954fea 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2634,6 +2634,7 @@ dependencies = [
  "serde",
  "serde_json",
  "sysinfo",
+ "tabled",
  "tar",
  "tempfile",
  "xz",
@@ -2694,6 +2695,17 @@ dependencies = [
  "unwind",
 ]
 
+[[package]]
+name = "papergrid"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a2ccbe15f2b6db62f9a9871642746427e297b0ceb85f9a7f1ee5ff47d184d0c8"
+dependencies = [
+ "bytecount",
+ "fnv",
+ "unicode-width",
+]
+
 [[package]]
 name = "parking_lot"
 version = "0.11.2"
@@ -2902,6 +2914,30 @@ dependencies = [
  "pad",
 ]
 
+[[package]]
+name = "proc-macro-error"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "da25490ff9892aab3fcf7c36f08cfb902dd3e71ca0f9f9517bea02a73a5ce38c"
+dependencies = [
+ "proc-macro-error-attr",
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+ "version_check",
+]
+
+[[package]]
+name = "proc-macro-error-attr"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1be40180e52ecc98ad80b184934baf3d0d29f979574e439af5a55274b35f869"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "version_check",
+]
+
 [[package]]
 name = "proc-macro-hack"
 version = "0.5.20+deprecated"
@@ -5153,6 +5189,30 @@ dependencies = [
  "test",
 ]
 
+[[package]]
+name = "tabled"
+version = "0.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4d38d39c754ae037a9bc3ca1580a985db7371cd14f1229172d1db9093feb6739"
+dependencies = [
+ "papergrid",
+ "tabled_derive",
+ "unicode-width",
+]
+
+[[package]]
+name = "tabled_derive"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "99f688a08b54f4f02f0a3c382aefdb7884d3d69609f785bd253dc033243e3fe4"
+dependencies = [
+ "heck",
+ "proc-macro-error",
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+]
+
 [[package]]
 name = "tar"
 version = "0.4.38"
diff --git a/src/ci/docker/run.sh b/src/ci/docker/run.sh
index e9c155b137836..22aabda2bb34b 100755
--- a/src/ci/docker/run.sh
+++ b/src/ci/docker/run.sh
@@ -264,6 +264,9 @@ else
   BASE_COMMIT=""
 fi
 
+SUMMARY_FILE=github-summary.md
+touch $objdir/${SUMMARY_FILE}
+
 docker \
   run \
   --workdir /checkout/obj \
@@ -275,6 +278,7 @@ docker \
   --env CI \
   --env GITHUB_ACTIONS \
   --env GITHUB_REF \
+  --env GITHUB_STEP_SUMMARY="/checkout/obj/${SUMMARY_FILE}" \
   --env TOOLSTATE_REPO_ACCESS_TOKEN \
   --env TOOLSTATE_REPO \
   --env TOOLSTATE_PUBLISH \
@@ -289,6 +293,8 @@ docker \
   rust-ci \
   $command
 
+cat $objdir/${SUMMARY_FILE} >> "${GITHUB_STEP_SUMMARY}"
+
 if [ -f /.dockerenv ]; then
   rm -rf $objdir
   docker cp checkout:/checkout/obj $objdir
diff --git a/src/tools/opt-dist/Cargo.toml b/src/tools/opt-dist/Cargo.toml
index f1c3dd6aa9bb0..c212e8aafe176 100644
--- a/src/tools/opt-dist/Cargo.toml
+++ b/src/tools/opt-dist/Cargo.toml
@@ -23,3 +23,4 @@ glob = "0.3"
 tempfile = "3.5"
 derive_builder = "0.12"
 clap = { version = "4", features = ["derive"] }
+tabled = "0.13"
diff --git a/src/tools/opt-dist/src/main.rs b/src/tools/opt-dist/src/main.rs
index 978e2dfa4e864..03a1912f5ce02 100644
--- a/src/tools/opt-dist/src/main.rs
+++ b/src/tools/opt-dist/src/main.rs
@@ -13,10 +13,11 @@ use crate::exec::{cmd, Bootstrap};
 use crate::tests::run_tests;
 use crate::timer::Timer;
 use crate::training::{gather_llvm_bolt_profiles, gather_llvm_profiles, gather_rustc_profiles};
+use crate::utils::artifact_size::print_binary_sizes;
 use crate::utils::io::{copy_directory, move_directory, reset_directory};
 use crate::utils::{
-    clear_llvm_files, format_env_variables, print_binary_sizes, print_free_disk_space,
-    retry_action, with_log_group,
+    clear_llvm_files, format_env_variables, print_free_disk_space, retry_action, with_log_group,
+    write_timer_to_summary,
 };
 
 mod bolt;
@@ -359,6 +360,10 @@ fn main() -> anyhow::Result<()> {
     let result = execute_pipeline(&env, &mut timer, build_args);
     log::info!("Timer results\n{}", timer.format_stats());
 
+    if let Ok(summary_path) = std::env::var("GITHUB_STEP_SUMMARY") {
+        write_timer_to_summary(&summary_path, &timer)?;
+    }
+
     print_free_disk_space()?;
     result.context("Optimized build pipeline has failed")?;
     print_binary_sizes(&env)?;
diff --git a/src/tools/opt-dist/src/utils/artifact_size.rs b/src/tools/opt-dist/src/utils/artifact_size.rs
new file mode 100644
index 0000000000000..4dc8952b60a44
--- /dev/null
+++ b/src/tools/opt-dist/src/utils/artifact_size.rs
@@ -0,0 +1,61 @@
+use std::io::Write;
+
+use tabled::builder::Builder;
+use tabled::settings::object::Columns;
+use tabled::settings::style::{BorderChar, Offset};
+use tabled::settings::{Modify, Style};
+
+use crate::environment::Environment;
+use crate::utils::io::get_files_from_dir;
+
+pub fn print_binary_sizes(env: &Environment) -> anyhow::Result<()> {
+    use humansize::format_size;
+    use humansize::BINARY;
+    use std::fmt::Write;
+
+    let root = env.build_artifacts().join("stage2");
+
+    let mut files = get_files_from_dir(&root.join("bin"), None)?;
+    files.extend(get_files_from_dir(&root.join("lib"), Some(".so"))?);
+    files.sort_unstable();
+
+    let items: Vec<_> = files
+        .into_iter()
+        .map(|file| {
+            let size = std::fs::metadata(file.as_std_path()).map(|m| m.len()).unwrap_or(0);
+            let size_formatted = format_size(size, BINARY);
+            let name = file.file_name().unwrap().to_string();
+            (name, size_formatted)
+        })
+        .collect();
+
+    // Write to log
+    let mut output = String::new();
+    for (name, size_formatted) in items.iter() {
+        let name = format!("{}:", name);
+        writeln!(output, "{name:<50}{size_formatted:>10}")?;
+    }
+    log::info!("Rustc artifact size\n{output}");
+
+    // Write to GitHub summary
+    if let Ok(summary_path) = std::env::var("GITHUB_STEP_SUMMARY") {
+        let mut builder = Builder::default();
+        for (name, size_formatted) in items {
+            builder.push_record(vec![name, size_formatted]);
+        }
+
+        builder.set_header(vec!["Artifact", "Size"]);
+        let mut table = builder.build();
+
+        let mut file = std::fs::File::options().append(true).create(true).open(summary_path)?;
+        writeln!(
+            file,
+            "# Artifact size\n{}\n",
+            table.with(Style::markdown()).with(
+                Modify::new(Columns::single(1)).with(BorderChar::horizontal(':', Offset::End(0))),
+            )
+        )?;
+    }
+
+    Ok(())
+}
diff --git a/src/tools/opt-dist/src/utils/mod.rs b/src/tools/opt-dist/src/utils/mod.rs
index 6fc96592a8858..ca1292dd5b86a 100644
--- a/src/tools/opt-dist/src/utils/mod.rs
+++ b/src/tools/opt-dist/src/utils/mod.rs
@@ -1,10 +1,13 @@
-pub mod io;
+use sysinfo::{DiskExt, RefreshKind, System, SystemExt};
 
 use crate::environment::Environment;
-use crate::utils::io::{delete_directory, get_files_from_dir};
-use humansize::{format_size, BINARY};
+use crate::timer::Timer;
+use crate::utils::io::delete_directory;
+use humansize::BINARY;
 use std::time::Duration;
-use sysinfo::{DiskExt, RefreshKind, System, SystemExt};
+
+pub mod artifact_size;
+pub mod io;
 
 pub fn format_env_variables() -> String {
     let vars = std::env::vars().map(|(key, value)| format!("{key}={value}")).collect::<Vec<_>>();
@@ -26,28 +29,6 @@ pub fn print_free_disk_space() -> anyhow::Result<()> {
     Ok(())
 }
 
-pub fn print_binary_sizes(env: &Environment) -> anyhow::Result<()> {
-    use std::fmt::Write;
-
-    let root = env.build_artifacts().join("stage2");
-
-    let mut files = get_files_from_dir(&root.join("bin"), None)?;
-    files.extend(get_files_from_dir(&root.join("lib"), Some(".so"))?);
-    files.sort_unstable();
-
-    let mut output = String::new();
-    for file in files {
-        let size = std::fs::metadata(file.as_std_path())?.len();
-        let size_formatted = format_size(size, BINARY);
-        let name = format!("{}:", file.file_name().unwrap());
-        writeln!(output, "{name:<50}{size_formatted:>10}")?;
-    }
-
-    log::info!("Rustc artifact size\n{output}");
-
-    Ok(())
-}
-
 pub fn clear_llvm_files(env: &Environment) -> anyhow::Result<()> {
     // Bootstrap currently doesn't support rebuilding LLVM when PGO options
     // change (or any other llvm-related options); so just clear out the relevant
@@ -58,6 +39,24 @@ pub fn clear_llvm_files(env: &Environment) -> anyhow::Result<()> {
     Ok(())
 }
 
+/// Write the formatted statistics of the timer to a Github Actions summary.
+pub fn write_timer_to_summary(path: &str, timer: &Timer) -> anyhow::Result<()> {
+    use std::io::Write;
+
+    let mut file = std::fs::File::options().append(true).create(true).open(path)?;
+    writeln!(
+        file,
+        r#"# Step durations
+
+```
+{}
+```
+"#,
+        timer.format_stats()
+    )?;
+    Ok(())
+}
+
 /// Wraps all output produced within the `func` closure in a CI output group, if we're running in
 /// CI.
 pub fn with_log_group<F: FnOnce() -> R, R>(group: &str, func: F) -> R {