Add compile profile to justfile

.gitignore

@@ -24,3 +24,6 @@
 
 # cargo flamegraph
 /flamegraph.svg
+
+# compile profiling outputs
+/.compile-profile/

bff/src/bigfile/v1_2000_77_18_pc/mod.rs

@@ -39,6 +39,7 @@ impl BigFileIo for BigFileV1_2000_77_18PC {
 
         let pos = reader.stream_position().unwrap();
         let len = reader.seek(SeekFrom::End(0)).unwrap();
+        // FIXME: FRAGMENTS\UWP_MSSTORE\v1_2000_97_19\DATAS\CONSULTANTS.DUA has a pool and fails this assert
         assert_eq!(pos, len);
 
         Ok(BigFile {

justfile

@@ -81,6 +81,7 @@ install-dev-deps:
     rustup install nightly
     rustup update nightly
     cargo install --locked cargo-sort flamegraph cargo-deny zizmor cargo-machete
+    cargo install --locked --git https://github.com/rust-lang/measureme summarize
     {{ if os() == 'windows' { 'cargo install --locked blondie' } else { '' } }}
 
 install-dev-deps-wasm:
@@ -100,6 +101,70 @@ flamegraph CMD *OPTIONS:
     $ENV:DTRACE = "blondie_dtrace"
     cargo flamegraph --release --bin {{ CMD }} -- {{ OPTIONS }}
 
+# cargo-build timings (https://doc.rust-lang.org/cargo/reference/timings.html),
+# rustc -Ztime-passes, and measureme summarize (https://github.com/rust-lang/measureme)
+[unix]
+profile-compile *TARGET:
+    #! /usr/bin/env bash
+    set -euo pipefail
+    out=".compile-profile"
+    tmp_target="$(mktemp -d -t bff-self-profile-XXXXXX)"
+    trap 'rm -rf "$tmp_target"' EXIT
+    rm -rf "$out"
+    mkdir -p "$out"
+    CARGO_TARGET_DIR="$tmp_target" cargo +nightly build --timings {{ TARGET }}
+    if [ -d "$tmp_target/cargo-timings" ]; then
+      cp -f "$tmp_target"/cargo-timings/*.html "$out"/ || true
+    fi
+    CARGO_TARGET_DIR="$tmp_target" RUSTFLAGS="-Ztime-passes" cargo +nightly build -j 1 {{ TARGET }} 2> "$out/time-passes.log"
+    grep -E "expand|typeck|borrowck|codegen|LLVM|link" "$out/time-passes.log" > "$out/time-passes-phases.txt" || true
+    CARGO_TARGET_DIR="$tmp_target" RUSTFLAGS="-Zself-profile=$tmp_target/self-profile" cargo +nightly build {{ TARGET }}
+    latest="$(find "$tmp_target" -name '*.events' -type f | head -n 1 || true)"
+    if [ -n "$latest" ] && command -v summarize >/dev/null 2>&1; then
+      prefix="${latest%.events}"
+      summarize summarize "$prefix" > "$out/self-profile-summary.txt" || true
+    elif [ -n "$latest" ]; then
+      echo "summarize tool not found; install with: cargo install --locked --git https://github.com/rust-lang/measureme summarize" > "$out/self-profile-summary.txt"
+    fi
+    echo "Wrote compile profile artifacts to $out"
+
+# cargo-build timings (https://doc.rust-lang.org/cargo/reference/timings.html),
+# rustc -Ztime-passes, and measureme summarize (https://github.com/rust-lang/measureme)
+[windows]
+profile-compile *TARGET:
+    #!powershell -NoLogo
+    $out = ".compile-profile"
+    $tmpTarget = Join-Path $env:TEMP ("bff-self-profile-" + [guid]::NewGuid().ToString("N"))
+    if (Test-Path $out) { Remove-Item -Recurse -Force $out -ErrorAction SilentlyContinue }
+    try {
+        New-Item -ItemType Directory -Path $out -Force | Out-Null
+        $env:CARGO_TARGET_DIR = $tmpTarget
+        cargo +nightly build --timings {{ TARGET }}
+        if (Test-Path "$tmpTarget\\cargo-timings") {
+            Copy-Item "$tmpTarget\\cargo-timings\\*.html" -Destination $out -Force
+        }
+        $env:RUSTFLAGS = "-Ztime-passes"
+        cargo +nightly build -j 1 {{ TARGET }} 2> "$out\\time-passes.log"
+        Remove-Item Env:RUSTFLAGS -ErrorAction SilentlyContinue
+        Select-String -Path "$out\\time-passes.log" -Pattern "expand|typeck|borrowck|codegen|LLVM|link" | Set-Content "$out\\time-passes-phases.txt"
+        $env:RUSTFLAGS = "-Zself-profile=$tmpTarget\\self-profile"
+        cargo +nightly build {{ TARGET }}
+        Remove-Item Env:RUSTFLAGS -ErrorAction SilentlyContinue
+        Remove-Item Env:CARGO_TARGET_DIR -ErrorAction SilentlyContinue
+        $latest = Get-ChildItem -Recurse -File $tmpTarget -Filter "*.events" | Sort-Object LastWriteTime -Descending | Select-Object -First 1
+        if ($latest -and (Get-Command summarize -ErrorAction SilentlyContinue)) {
+            $prefix = [System.IO.Path]::Combine($latest.DirectoryName, [System.IO.Path]::GetFileNameWithoutExtension($latest.Name))
+            summarize summarize $prefix | Set-Content "$out\\self-profile-summary.txt"
+        } elseif ($latest) {
+            Set-Content "$out\\self-profile-summary.txt" "summarize tool not found; install with: cargo install --locked --git https://github.com/rust-lang/measureme summarize"
+        }
+    } finally {
+        Remove-Item Env:RUSTFLAGS -ErrorAction SilentlyContinue
+        Remove-Item Env:CARGO_TARGET_DIR -ErrorAction SilentlyContinue
+        if (Test-Path $tmpTarget) { Remove-Item -Recurse -Force $tmpTarget -ErrorAction SilentlyContinue }
+    }
+    Write-Output "Wrote compile profile artifacts to $out"
+
 zizmor:
     zizmor --persona auditor --collect all .github/workflows/build.yml .github/workflows/build-wasm.yml