Add profiling instructions

Cargo.lock

@@ -3115,6 +3115,15 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "nvtx"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "358dc398b07348e7541bf065ee313e8215a7832e07fab385f51683dc3be83ec7"
+dependencies = [
+ "cc",
+]
+
 [[package]]
 name = "objc"
 version = "0.2.7"
@@ -5987,6 +5996,7 @@ dependencies = [
  "graphene-core",
  "log",
  "num-traits",
+ "nvtx",
  "serde",
  "spirv",
  "web-sys",

node-graph/graphene-cli/Cargo.toml

@@ -16,6 +16,7 @@ gpu = [
 default = ["wgpu"]
 wgpu = ["wgpu-executor", "gpu", "graphene-std/wgpu"]
 wayland = ["graphene-std/wayland"]
+profiling = ["wgpu-executor/profiling"]
 
 
 [dependencies]

node-graph/wgpu-executor/Cargo.toml

@@ -6,6 +6,7 @@ license = "MIT OR Apache-2.0"
 
 [features]
 default = []
+profiling = ["nvtx"]
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
@@ -38,3 +39,4 @@ futures-intrusive = "0.5.0"
 futures = "0.3.25"
 web-sys = { version = "0.3.4", features = ["HtmlCanvasElement"] }
 winit = "0.28.6"
+nvtx = { version = "1.1.1", optional = true }