feat(CI): Set up CodSpeed

.github/workflows/codspeed.yml

@@ -0,0 +1,36 @@
+name: CodSpeed
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+  workflow_dispatch:
+
+permissions:
+  contents: read  # Check out the repository and its submodules
+  id-token: write  # Authenticate result uploads to CodSpeed via OIDC
+
+jobs:
+  benchmarks:
+    name: Run benchmarks
+    runs-on: codspeed-macro
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
+        with:
+          submodules: recursive
+          persist-credentials: false
+
+      - name: Set up Rust
+        uses: moonrepo/setup-rust@abb2d32350334249b178c401e5ec5836e0cd88d3  # v1.3.0
+        with:
+          channel: stable
+          cache-target: release
+
+      - name: Run benchmarks
+        uses: CodSpeedHQ/action@78102a468f96d8e0ccb92d0ec49425753fc42062  # v5.6.0
+        with:
+          mode: walltime
+          run: make benchmark

.gitmodules

@@ -0,0 +1,4 @@
+[submodule "tests/fixtures/sdk-benchmarks"]
+	path = benchmarks/fixtures/sdk-benchmarks
+	url = https://github.com/Flagsmith/sdk-benchmarks.git
+	branch = 0.0.2

Cargo.toml

@@ -11,8 +11,7 @@ readme = "README.md"
 categories = ["config", "api-bindings"]
 keywords = ["Flagsmith", "feature-flag", "remote-config"]
 rust-version = "1.86.0"
-# The SDK spec steps are a separate crate used only in CI.
-exclude = ["/sdk-spec"]
+exclude = ["/sdk-spec", "/benchmarks"]  # CI only
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 

Makefile

@@ -0,0 +1,11 @@
+CARGO_CODSPEED_VERSION := 6.0.0
+SDK_BENCHMARKS := benchmarks/fixtures/sdk-benchmarks
+
+$(SDK_BENCHMARKS)/environments:
+	git submodule update --init -- $(SDK_BENCHMARKS)
+
+.PHONY: benchmark
+benchmark: | $(SDK_BENCHMARKS)/environments
+	cargo install --locked cargo-codspeed@$(CARGO_CODSPEED_VERSION)
+	cd benchmarks && cargo codspeed build --locked --measurement-mode walltime
+	cd benchmarks && SDK_BENCHMARKS_ENVIRONMENTS=$(CURDIR)/$(SDK_BENCHMARKS)/environments cargo codspeed run --measurement-mode walltime

benchmarks/.gitignore

@@ -0,0 +1 @@
+/target