build: added perf.sh to generate perf.data and flamecharts

.gitignore

@@ -3,3 +3,5 @@
 /flamegraph.svg
 /perf.data
 /perf.data.old
+/perf-output.data
+/profile.json

Cargo.toml

@@ -14,6 +14,11 @@ strip = true
 lto = true
 opt-level = "s"
 
+[profile.profiling]
+inherits = "release"
+strip = false
+debug = true
+
 [build-dependencies]
 glib-build-tools = "0.18.0"
 

perf.sh

@@ -0,0 +1,11 @@
+#!/bin/env bash
+
+# Build the app in profiling mode
+cargo build --profile profiling
+
+# Generate perf.data and flamechart for the app
+# cargo install flamegraph
+flamegraph --flamechart -F 2000 -- ./target/profiling/anime-games-launcher
+
+# Format perf.data to the profiler.firefox.com compatible format
+perf script -F +pid > perf-output.data