1 files changed, 58 insertions, 0 deletions
diff --git a/bench-manyfiles.sh b/bench-manyfiles.sh
new file mode 100755
index 0000000..39e6c2e
--- /dev/null
+++ b/bench-manyfiles.sh
@@ -0,0 +1,58 @@
+#!/bin/bash
+#
+# Run a simple benchmark of an incremental backup of many empty files,
+# when the live data hasn't changed.
+#
+# Edit the if-statement towards the end to get a flamegraph to see
+# where time is actually spent.
+#
+# This is very simplistic and could do with a lot of improvement. But
+# it's a start.
+
+set -euo pipefail
+
+N=100000
+
+TMP="$(mktemp -d)"
+trap 'rm -rf "$TMP"' EXIT
+
+chunks="$TMP/chunks"
+live="$TMP/live"
+
+mkdir "$chunks"
+mkdir "$live"
+python3 manyfiles.py "$live" "$N"
+
+cat <<EOF >"$TMP/server.yaml"
+address: localhost:8888
+chunks: $chunks
+tls_key: test.key
+tls_cert: test.pem
+EOF
+
+cat <<EOF >"$TMP/client.yaml"
+server_url: https://localhost:8888
+verify_tls_cert: false
+roots:
+  - $live
+log: $TMP/client.log
+EOF
+
+cargo build -q --release --all-targets
+
+OBNAM_SERVER_LOG=error cargo run -q --release --bin obnam-server -- "$TMP/server.yaml" >/dev/null &
+pid="$!"
+
+cargo run -q --release --bin obnam -- --config "$TMP/client.yaml" init --insecure-passphrase=hunter2
+
+# Initial backup.
+cargo run -q --release --bin obnam -- --config "$TMP/client.yaml" backup >/dev/null
+
+# Incremental backup.
+if true; then
+	/usr/bin/time --format=%e cargo run -q --release --bin obnam -- --config "$TMP/client.yaml" backup >/dev/null
+else
+	cargo flamegraph --bin obnam -o obnam.svg -- --config "$TMP/client.yaml" backup >/dev/null
+fi
+
+kill "$pid"