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[Test] Measure where the hash-graph compile spends its time #10005

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[Test] Measure where the hash-graph compile spends its time #10005

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83 changes: 83 additions & 0 deletions .github/workflows/hash-graph-compile-timings.yml
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name: hash-graph compile timings

on:
pull_request:
paths:
- .github/workflows/hash-graph-compile-timings.yml

jobs:
sccache-credentials:
runs-on: ubuntu-24.04
permissions:
contents: read
id-token: write
outputs:
encrypted-credentials: ${{ steps.mint.outputs.encrypted_credentials }}
steps:
- name: Checkout source code
uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

- name: Mint sccache credentials
id: mint
uses: $/.github/actions/mint-sccache-credentials
with:
vault_address: ${{ vars.VAULT_STAGE_ADDR }}
cf_access_client_id: ${{ vars.CF_ACCESS_STAGE_CLIENT_ID }}
cf_access_client_secret: ${{ secrets.CF_ACCESS_STAGE_CLIENT_SECRET }}
encryption_key: ${{ secrets.SCCACHE_ENC_KEY }}

compile:
name: Compile (debug=${{ matrix.debug }})
needs: [sccache-credentials]
runs-on: ubuntu-24.04
permissions:
contents: read
strategy:
fail-fast: false
matrix:
# `default` leaves `CARGO_PROFILE_DEV_DEBUG` unset, as on `main`.
debug: [default, line-tables-only]
steps:
- name: Checkout
uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

- name: Clean up disk
uses: $/.github/actions/clean-up-disk

- name: Install tools
uses: $/.github/actions/install-tools
with:
token: ${{ secrets.GITHUB_TOKEN }}
encrypted_sccache_credentials: ${{ needs.sccache-credentials.outputs.encrypted-credentials }}
sccache_encryption_key: ${{ secrets.SCCACHE_ENC_KEY }}

- name: Set debug info level
if: matrix.debug != 'default'
run: echo "CARGO_PROFILE_DEV_DEBUG=${{ matrix.debug }}" >> "$GITHUB_ENV"

- name: Compile hash-graph with timings
run: |
"$RUSTC_WRAPPER" --zero-stats
SECONDS=0
cargo build --bin hash-graph --all-features --timings
echo "::notice::Full compile took ${SECONDS}s"
"$RUSTC_WRAPPER" --show-stats
ls -l target/debug/hash-graph

- name: Recompile only the binary crate with pass timings
run: |
touch apps/hash-graph/src/main.rs
SECONDS=0
cargo rustc --bin hash-graph --all-features -- -Z time-passes > time-passes.txt 2>&1
echo "::notice::Binary crate recompile took ${SECONDS}s"
grep -E "^time: .* (total|link|link_crate|run_linker|codegen_crate|LLVM_passes|finish_ongoing_codegen)$" time-passes.txt || tail -n 40 time-passes.txt

- name: Upload timings
if: always()
uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
with:
name: compile-timings-${{ matrix.debug }}
path: |
target/cargo-timings
time-passes.txt
/tmp/sccache.log
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