Organize Iris support files

scripts/run-bench.sh

@@ -0,0 +1,25 @@
+#!/bin/sh
+# Runs iris's on-demand benchmark suite.
+# Never run by `cargo test`; run this by hand or before/after a layout
+# change. Always release -- see AGENTS.md's own rule against reading a
+# frame time from a debug build.
+#
+#   ./scripts/run-bench.sh            # everything
+#   ./scripts/run-bench.sh list       # just the CPU-only message-list scenarios
+#   ./scripts/run-bench.sh images     # just the GPU bind-group-creation scenario
+set -eu
+scripts=$(cd "$(dirname "$0")" && pwd)
+root=$(cd "$scripts/.." && pwd)
+cd "$root"
+
+what="${1:-all}"
+
+if [ "$what" = "all" ] || [ "$what" = "list" ]; then
+    echo "=== message_list (CPU-only, no window) ==="
+    cargo bench --bench message_list
+fi
+
+if [ "$what" = "all" ] || [ "$what" = "images" ]; then
+    echo "=== bench_images (real wgpu device, via run-headless.sh) ==="
+    timeout 60 "$scripts/run-headless.sh" bench_images --seconds 4 2>&1 | grep "^BENCH_IMAGES"
+fi