@comyata/run/Stats.js

Simplify data workflows and management with data templates, for browser and server.

export const walkStats = (fileEvalStats, parents = []) => {
  let lines = [];
  lines.push(`evaluated file ${JSON.stringify(fileEvalStats.file)} with ${fileEvalStats.files.size} imports and ${fileEvalStats.totalExpressions} expressions in ${fileEvalStats.dur}ms`);
  if (parents.length) {
    lines.push(`  import chain: ${parents.map(([p, ps]) => JSON.stringify(`${ps.file}#${p}`)).join(' ⮞ ')} ⮞ .`);
  }
  // keeping file stats belonging together in the same output, first print only the own file expr stats
  for (const [exprPointer, exprStats] of fileEvalStats.evaluated.entries()) {
    lines.push(`  expression at ${JSON.stringify(exprPointer)} with ${exprStats.imports.length} imports and ${exprStats.totalExpressions} expressions was evaluated in ${exprStats.dur}ms`);
  }
  // then print stats for all import by each expr
  for (const [exprPointer, exprStats] of fileEvalStats.evaluated.entries()) {
    if (exprStats.imports.length) {
      exprStats.imports.forEach(importEvalStats => {
        lines = lines.concat(walkStats(importEvalStats, [...parents, [exprPointer, fileEvalStats]]));
      });
    }
  }
  return lines;
};