From 5e82fce0a0051d694ab14467c120a1578c86bb42 Mon Sep 17 00:00:00 2001
From: Matt Mastracci <matthew@mastracci.com>
Date: Wed, 8 Nov 2023 13:00:13 -0700
Subject: chore: remove op_baseline and flamebench (#21120)

ops are better tested in deno_core, and flamebench has rotted quite a
bit.
---
 tools/README.md     |  29 -------------
 tools/flamebench.js | 114 ----------------------------------------------------
 2 files changed, 143 deletions(-)
 delete mode 100755 tools/flamebench.js

(limited to 'tools')

diff --git a/tools/README.md b/tools/README.md
index 0c9607380..f30e16b8f 100644
--- a/tools/README.md
+++ b/tools/README.md
@@ -31,35 +31,6 @@ executable
 cargo run -- run --allow-read --allow-write --allow-run --unstable ./tools/<script>
 ```
 
-## flamebench.js
-
-`flamebench.js` facilitates profiling and generating flamegraphs from
-benchmarks.
-
-General usage:
-
-```
-❯ ./tools/flamebench.js
-flamebench <bench_name> [bench_filter]
-
-Available benches:
-op_baseline
-ser
-de
-```
-
-To profile the `op_baseline` bench, run `./tools/flamebench.js op_baseline`,
-this will run all 3 benches in `op_baseline.
-
-Often when profiling/optimizing, you'll want to focus on a specific sub-bench,
-`flamebench` supports a bench/test filter arg like the regular cargo commands.
-So you can simply run `./tools/flamebench.js op_baseline bench_op_async` or
-`./tools/flamebench.js op_baseline bench_op_nop` to profile specific benches.
-
-Tip: the `[bench_filter]` argument doesn't have to be an exact bench name, you
-can use a shorthand or a partial match to profile a group of benches, e.g:
-`./tools/flamebench.js de v8`
-
 ## copyright_checker.js
 
 `copyright_checker.js` is used to check copyright headers in the codebase.
diff --git a/tools/flamebench.js b/tools/flamebench.js
deleted file mode 100755
index 5d1fc161d..000000000
--- a/tools/flamebench.js
+++ /dev/null
@@ -1,114 +0,0 @@
-#!/usr/bin/env -S deno run --unstable --allow-read --allow-run
-// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
-import { join, ROOT_PATH as ROOT } from "./util.js";
-
-const { 0: benchName, 1: benchFilter } = Deno.args;
-// Print usage if no bench specified
-if (!benchName) {
-  console.log("flamebench.js <bench_name> [bench_filter]");
-  // Also show available benches
-  console.log("\nAvailable benches:");
-  const benches = await availableBenches();
-  console.log(benches.join("\n"));
-  return Deno.exit(1);
-}
-
-// List available benches, hoping we don't have any benches called "ls" :D
-if (benchName === "ls") {
-  const benches = await availableBenches();
-  console.log(benches.join("\n"));
-  return;
-}
-
-// Ensure flamegraph is installed
-if (!await binExists("flamegraph")) {
-  console.log(
-    "flamegraph (https://github.com/flamegraph-rs/flamegraph) not found, please run:",
-  );
-  console.log();
-  console.log("cargo install flamegraph");
-  return Deno.exit(1);
-}
-
-// Build bench with frame pointers
-await bashThrough(
-  `RUSTFLAGS='-C force-frame-pointers=y' cargo build --release --bench ${benchName}`,
-);
-
-// Get the freshly built bench binary
-const benchBin = await latestBenchBin(benchName);
-
-// Run flamegraph
-const outputFile = join(ROOT, "flamebench.svg");
-await runFlamegraph(benchBin, benchFilter, outputFile);
-
-// Open flamegraph (in your browser / SVG viewer)
-if (await binExists("open")) {
-  await bashThrough(`open ${outputFile}`);
-}
-
-async function availableBenches() {
-  // TODO(AaronO): maybe reimplement with fs.walk
-  // it's important to prune the walked tree so this is fast (<50ms)
-  const prunedDirs = ["third_party", ".git", "target", "docs", "test_util"];
-  const pruneExpr = prunedDirs.map((d) => `-path ${ROOT}/${d}`).join(" -o ");
-  return (await bashOut(`
-  find ${ROOT} -type d \
-      \\( ${pruneExpr} \\) \
-      -prune -false -o  \
-      -path "${ROOT}/*/benches/*" -type f -name "*.rs" \
-      | xargs basename | cut -f1 -d.
-  `)).split("\n");
-}
-
-function latestBenchBin(name) {
-  return bashOut(`ls -t "${ROOT}/target/release/deps/${name}"* | head -n 1`);
-}
-
-function runFlamegraph(benchBin, benchFilter, outputFile) {
-  return bashThrough(
-    `sudo -E flamegraph -o ${outputFile} ${benchBin} ${benchFilter ?? ""}`,
-    // Set $PROFILING env so benches can improve their flamegraphs
-    { env: { "PROFILING": "1" } },
-  );
-}
-
-async function bashOut(subcmd) {
-  const { success, stdout } = await new Deno.Command("bash", {
-    args: ["-c", subcmd],
-    stdout: "piped",
-    stderr: "null",
-  }).output();
-
-  // Check for failure
-  if (!success) {
-    throw new Error("subcmd failed");
-  }
-  // Gather output
-  const output = new TextDecoder().decode(stdout);
-
-  return output.trim();
-}
-
-async function bashThrough(subcmd, opts = {}) {
-  const { success, code } = await new Deno.Command("bash", {
-    ...opts,
-    args: ["-c", subcmd],
-    stdout: "inherit",
-    stderr: "inherit",
-  }).output();
-
-  // Exit process on failure
-  if (!success) {
-    Deno.exit(code);
-  }
-}
-
-async function binExists(bin) {
-  try {
-    await bashOut(`which ${bin}`);
-    return true;
-  } catch (_) {
-    return false;
-  }
-}
-- 
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