Initial commit

Cargo.toml

@@ -0,0 +1,28 @@
+[package]
+name        = "ecs_dt_benchmark"
+version     = "0.1.0"
+edition     = "2021"
+description = "ECS Digital Twin runtime benchmark — TRANSIT lab / UQAC"
+
+# No default features: we do NOT want a window, renderer, audio, or anything
+# that requires a display. Pure headless ECS.
+[dependencies]
+bevy_ecs   = { version = "0.18", default-features = false }
+rand       = { version = "0.8",  features = ["small_rng"] }
+rand_chacha = "0.3"
+
+[profile.release]
+opt-level   = 3
+lto         = "thin"     # thin LTO: good balance between link time and perf
+codegen-units = 1        # single CGU for max inlining across crate boundary
+panic       = "abort"    # smaller binary, no unwinding overhead
+
+[profile.bench]
+inherits  = "release"
+debug     = true         # keep symbols so perf/flamegraph works on RPi
+
+# On aarch64 (RPi 5 Cortex-A76) the compiler can use NEON by default.
+# Uncomment the line below for the RPi 5 build to also enable SVE if your
+# toolchain supports it (most don't yet for aarch64-unknown-linux-gnu):
+# [target.aarch64-unknown-linux-gnu]
+# rustflags = ["-C", "target-cpu=cortex-a76"]