add bash script to run a benchmark

packages/next-swc/crates/next-build-test/bench.sh

@@ -0,0 +1,51 @@
+#!/bin/bash
+
+# run a benchmark against this binary
+# using heaptrack to extract memory
+# usage numbers at g-max
+
+set -e
+
+COMMIT=${1:-HEAD} # the sha of the commit to benchmark
+PAGES=${2:-0} # the number of pages to build
+
+SCRIPTPATH="$( cd -- "$(dirname "$0")" >/dev/null 2>&1 ; pwd -P )"
+
+# build the binary
+cargo build --profile release-with-debug --manifest-path "$SCRIPTPATH/Cargo.toml"
+
+# create the config file by loading the default config and adding the required fields
+JS_CONFIG=$(cat "$SCRIPTPATH/jsConfig.json")
+NEXT_CONFIG=$(cat "$SCRIPTPATH/nextConfig.json")
+
+# create a temp dir and clone shadcn-ui into it
+TMPDIR=$(mktemp -d)
+git clone https://github.com/shadcn-ui/ui.git "$TMPDIR"
+cd "$TMPDIR"
+git checkout "$COMMIT"
+
+# install the dependencies
+pnpm install
+
+# create the project options file
+jq -n --arg jsConfig "$JS_CONFIG" --arg nextConfig "$NEXT_CONFIG" --arg tmpDir "$TMPDIR" '{
+    rootPath: $tmpDir,
+    projectPath: ($tmpDir + "/apps/www"),
+    jsConfig: $jsConfig, 
+    nextConfig: $nextConfig,
+    watch: false,
+    dev: false,
+    env: [],
+    defineEnv: {
+        client: [],
+        edge: [],
+        nodejs: []
+    }
+}' > project_options.json
+
+# heaptrack the binary with the project options in raw mode
+heaptrack --record-only "$SCRIPTPATH/../../../../target/release-with-debug/next-build-test" concurrent 12 "$PAGES"
+
+# get most recently created heaptrack profile and run it via heaptrack_print
+PROFILE=$(ls -t "$TMPDIR/heaptrack.*" | head -n1)
+heaptrack_print "$PROFILE" > "$SCRIPTPATH/result.log"