add bash script to run a benchmark (#64717)

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

@@ -0,0 +1,32 @@
+#!/bin/bash
+
+# run a benchmark against this binary
+# using heaptrack to extract memory
+# usage numbers at g-max
+
+set -e
+
+COMMIT=${1:-13d9693808badd4b92811abac5e18dc1cddf2384} # the sha of the commit to benchmark
+PAGES=${2:-"/sink,/examples/forms/appearance,/examples/cards,/examples/dashboard,/api/components,/examples/forms/notifications,/sink/new-york,/examples/forms/display,/blocks,/docs/[[...slug]]"} # the list 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 a temp dir and clone shadcn-ui into it
+TMPDIR=$(mktemp -d)
+git clone https://github.com/shadcn-ui/ui.git "$TMPDIR"
+cd "$TMPDIR/apps/www"
+git checkout "$COMMIT"
+
+# install the dependencies and change dir
+pnpm install
+
+# heaptrack the binary with the project options in raw mode
+heaptrack --record-only "$SCRIPTPATH/../../../../target/release-with-debug/next-build-test" concurrent 12 "$PAGES"
+"$SCRIPTPATH/../../../../target/release-with-debug/next-build-test" run concurrent 12 999 "$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"