Normalize historic benchmark data after adding OperationsPerInvocation annotation

[jack-berg]

In #8031 we updated the benchmarks to output actual operation figures instead of aggregate operations (where each operation performs a loop of 1024*10 operations).

See comment1 and comment2.

This screws up the benchmark history because all the figures now look 1024*10x higher than previously.

This PR fixes the issue by multiplying all benchmark figures prior to #8031 by 1024*10.

Current benchmark:

Benchmark with this PR:

Expand to see untracked one-off script used to make the change

#!/usr/bin/env node
/**
 * Update benchmark data to multiply old values by 10240.
 * Data prior to commit bf3c4f3085d631b08d2cd210c1ddc3cd86182a53 needs to be multiplied.
 */

const fs = require('fs');
const path = require('path');

// Read the file
const filePath = path.join(__dirname, 'benchmarks', 'data.js');
const content = fs.readFileSync(filePath, 'utf8');

// Extract the JSON part (remove the JavaScript wrapper)
const match = content.match(/window\.BENCHMARK_DATA = ({.*});?\s*$/s);
if (!match) {
  throw new Error('Could not find BENCHMARK_DATA in file');
}

const data = JSON.parse(match[1]);

// Target commit where the change was made
const targetCommit = 'bf3c4f3085d631b08d2cd210c1ddc3cd86182a53';

// Process entries
const entries = data.entries || {};
let totalUpdated = 0;

for (const [benchmarkType, benchmarkEntries] of Object.entries(entries)) {
  let foundTarget = false;

  // Iterate through commits in order
  for (let i = 0; i < benchmarkEntries.length; i++) {
    const entry = benchmarkEntries[i];
    const commitId = entry.commit?.id || '';

    // Check if this is the target commit
    if (commitId === targetCommit) {
      foundTarget = true;
      console.log(`Found target commit at index ${i}: ${commitId}`);
      continue;
    }

    // If we haven't found the target commit yet, multiply the values
    if (!foundTarget) {
      const benches = entry.benches || [];
      for (const bench of benches) {
        if ('value' in bench) {
          const oldValue = bench.value;
          bench.value = oldValue * 10240;
          totalUpdated++;
          if (totalUpdated <= 10) {
            console.log(`  Multiplied ${oldValue.toFixed(2)} -> ${bench.value.toFixed(2)} for commit ${commitId.substring(0, 8)}`);
          }
        }
      }
    }
  }
}

// Write back to file
const outputContent = `window.BENCHMARK_DATA = ${JSON.stringify(data, null, 2)};\n`;
fs.writeFileSync(filePath, outputContent, 'utf8');

console.log(`\nUpdate complete! Updated ${totalUpdated} benchmark values.`);