Generate tracy trace from chrome profile

profile.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+nix-shell --run "make -j '$(nproc --all)'"
+
+workspace=$(mktemp -d)
+
+function cleanup {
+    rm -rf "${workspace}"
+}
+
+trap cleanup EXIT
+
+chromejson="${workspace}"/out.json
+tracyfile="${workspace}"/out.tracy
+
+echo "[+] Instantiating derivation"
+NIX_SHOW_TRACE=1 ./outputs/out/bin/nix-instantiate $@ > "${chromejson}"
+
+echo "[+] Converting chrome profile to tracy profile"
+nix-shell -p tracy --run "import-chrome '${chromejson}' '${tracyfile}'"
+nix-shell -p tracy --run "tracy '${tracyfile}'"

src/nix-instantiate/nix-instantiate.cc

@@ -81,7 +81,8 @@ void processExpr(EvalState & state, const Strings & attrPaths,
                     if (store2)
                         drvPathS = store2->addPermRoot(drvPath, rootName);
                 }
-                std::cout << fmt("%s%s\n", drvPathS, (outputName != "out" ? "!" + outputName : ""));
+                // THis is polluting the nice trace we're generating, boo.
+                //    std::cout << fmt("%s%s\n", drvPathS, (outputName != "out" ? "!" + outputName : ""));
             }
         }
     }