}

export function parseMaxRssBytes(output) {

const match = output.match(/(\d+)\s+maximum resident set size/u);

return match ? Number.parseInt(match[1], 10) : null;

const match = output.match(

/(?:^|\n)[^\S\r\n]*(\d+)[^\S\r\n]+maximum resident set size[^\S\r\n]*(?:\r?\n|$)/u,

);

if (!match) {

return null;

}

const parsed = Number(match[1]);

return Number.isSafeInteger(parsed) && parsed >= 0 ? parsed : null;

}

export function formatRss(valueBytes) {

describe("bench-test-changed script", () => {

it("formats macOS time RSS bytes as MiB", () => {

expect(parseMaxRssBytes(" 2097152 maximum resident set size\n")).toBe(2_097_152);

expect(parseMaxRssBytes(" 2097152kb maximum resident set size\n")).toBeNull();

expect(parseMaxRssBytes(" 9007199254740993 maximum resident set size\n")).toBeNull();

expect(parseMaxRssBytes("2097152\nmaximum resident set size\n")).toBeNull();

expect(formatRss(2_097_152)).toBe("2.0MB");

expect(formatRss(-1_048_576)).toBe("-1.0MB");

});