Inicio do Projeto Piloto

tests/performance/baseline.test.ts

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+import { describe, expect, it } from "vitest";
+import { readSpreadsheet } from "@/infra/spreadsheet/parse";
+import { buildCsv, buildXlsx } from "@/infra/export/tabular";
+
+function csv(rows: number): Buffer {
+  const lines = ["Nome,Valor"];
+  for (let index = 0; index < rows; index += 1) lines.push(`Pessoa ${index},${index}`);
+  return Buffer.from(lines.join("\n"), "utf8");
+}
+
+async function measure(rows: number) {
+  const bytes = csv(rows);
+  const started = performance.now();
+  const parsed = await readSpreadsheet("amostra.csv", bytes);
+  const readMs = performance.now() - started;
+  const writeStarted = performance.now();
+  buildCsv(parsed.grid.headers, parsed.grid.rows);
+  const csvMs = performance.now() - writeStarted;
+  const xlsxStarted = performance.now();
+  await buildXlsx(parsed.grid.headers, parsed.grid.rows);
+  const xlsxMs = performance.now() - xlsxStarted;
+  return { rows, readMs, csvMs, xlsxMs, heapMb: Math.round(process.memoryUsage().heapUsed / 1024 / 1024) };
+}
+
+describe("baseline de planilha", () => {
+  it("mede leitura e escrita em amostra pequena e média", async () => {
+    const small = await measure(200);
+    const medium = await measure(5_000);
+    expect(small.readMs).toBeLessThan(5_000);
+    expect(medium.readMs).toBeLessThan(15_000);
+    expect(medium.xlsxMs).toBeLessThan(30_000);
+    expect(small.rows).toBe(200);
+  });
+});