diff --git a/data/generated.ts b/data/generated.ts
index 2f32f94..87d657c 100644
--- a/data/generated.ts
+++ b/data/generated.ts
@@ -12,9 +12,11 @@ async function main() {
 		.pipeThrough(new TextLineStream());
 
 	const stats = new Tracker();
+	stats.update([0, "total", Number(Temporal.Now.instant().epochNanoseconds)]);
 	try {
 		for await (const line of lines) stats.update(JSON.parse(line) as Msg);
 	} catch (_) { /* STDOUT closed */ }
+	stats.update([1, "total", Number(Temporal.Now.instant().epochNanoseconds)]);
 
 	stats.log();
 }
@@ -41,7 +43,8 @@ class Tracker {
 	}
 
 	log() {
-		for (const section of this.register.values()) section.log();
+		const total = this.register.get("total")?.average();
+		for (const section of this.register.values()) section.log(total);
 		Deno.exit(0);
 	}
 }
@@ -69,11 +72,21 @@ class SectionTracker {
 		this.runs.push(duration);
 	}
 
-	log() {
+	log(total_average: number | undefined) {
 		const count = this.runs.length;
-		const avg = this.average() / 1_000;
-		const line = \`\${this.name} :\\t\${count} runs, \${avg} µs avg\`;
-		console.log(line);
+		const avg = this.average();
+		const cumul = count * this.average();
+		const fraciton = Math.floor((total_average ? cumul / total_average : 0) * 100);
+		const show_total = total_average !== undefined && this.name !== "total";
+		const columns = [
+			this.name,
+			\`\${count} runs\`,
+			\`\${to_human(avg)} avg\`,
+			\`\${to_human(cumul)} cumul\`,
+			...(show_total ? [\`\${fraciton} %\`] : []),
+		];
+		const line = columns.map((e) => e.padStart(18));
+		console.log(...line);
 	}
 
 	average() {
@@ -82,5 +95,23 @@ class SectionTracker {
 	}
 }
 
+function to_human(duration_ns: number) {
+	const units = [
+		[3_600_000_000_000, "h"],
+		[60_000_000_000, "min"],
+		[1_000_000_000, "s"],
+		[1_000_000, "ms"],
+		[1_000, "µs"],
+		[1, "ns"],
+	] as const;
+	for (const [fac, name] of units) {
+		if ((duration_ns / fac) < 1.) continue;
+		const mapped_duration = duration_ns / fac;
+		const [integral, decimal] = mapped_duration.toString().split(".");
+		const formatted = \`\${integral}.\${decimal.slice(0, 3).padEnd(3, "0")}\`;
+		return \`\${formatted} \${name}\`;
+	}
+}
+
 if (import.meta.main) await main();
 `;
\ No newline at end of file
diff --git a/src/child.ts b/src/child.ts
index ad8356d..ba1971d 100644
--- a/src/child.ts
+++ b/src/child.ts
@@ -12,9 +12,11 @@ async function main() {
 		.pipeThrough(new TextLineStream());
 
 	const stats = new Tracker();
+	stats.update([0, "total", Number(Temporal.Now.instant().epochNanoseconds)]);
 	try {
 		for await (const line of lines) stats.update(JSON.parse(line) as Msg);
 	} catch (_) { /* STDOUT closed */ }
+	stats.update([1, "total", Number(Temporal.Now.instant().epochNanoseconds)]);
 
 	stats.log();
 }
@@ -41,7 +43,8 @@ class Tracker {
 	}
 
 	log() {
-		for (const section of this.register.values()) section.log();
+		const total = this.register.get("total")?.average();
+		for (const section of this.register.values()) section.log(total);
 		Deno.exit(0);
 	}
 }
@@ -69,11 +72,21 @@ class SectionTracker {
 		this.runs.push(duration);
 	}
 
-	log() {
+	log(total_average: number | undefined) {
 		const count = this.runs.length;
-		const avg = this.average() / 1_000;
-		const line = `${this.name} :\t${count} runs, ${avg} µs avg`;
-		console.log(line);
+		const avg = this.average();
+		const cumul = count * this.average();
+		const fraciton = Math.floor((total_average ? cumul / total_average : 0) * 100);
+		const show_total = total_average !== undefined && this.name !== "total";
+		const columns = [
+			this.name,
+			`${count} runs`,
+			`${to_human(avg)} avg`,
+			`${to_human(cumul)} cumul`,
+			...(show_total ? [`${fraciton} %`] : []),
+		];
+		const line = columns.map((e) => e.padStart(18));
+		console.log(...line);
 	}
 
 	average() {
@@ -82,4 +95,22 @@ class SectionTracker {
 	}
 }
 
+function to_human(duration_ns: number) {
+	const units = [
+		[3_600_000_000_000, "h"],
+		[60_000_000_000, "min"],
+		[1_000_000_000, "s"],
+		[1_000_000, "ms"],
+		[1_000, "µs"],
+		[1, "ns"],
+	] as const;
+	for (const [fac, name] of units) {
+		if ((duration_ns / fac) < 1.) continue;
+		const mapped_duration = duration_ns / fac;
+		const [integral, decimal] = mapped_duration.toString().split(".");
+		const formatted = `${integral}.${decimal.slice(0, 3).padEnd(3, "0")}`;
+		return `${formatted} ${name}`;
+	}
+}
+
 if (import.meta.main) await main();
diff --git a/src/lib/observer.ts b/src/lib/observer.ts
index 601035f..4c4ff0c 100644
--- a/src/lib/observer.ts
+++ b/src/lib/observer.ts
@@ -38,6 +38,7 @@ export class Observer {
 			"run",
 			`--allow-read=${socket_path}`,
 			`--allow-write=${socket_path}`,
+			"--unstable-temporal",
 			"-",
 			socket_path,
 		];