🥊 BrowserBout

Safari 27.0.1 vs Vivaldi 8.2.4133.87 — automated head-to-head on a real Mac.

2026-10-16 21:45 · full mode · Mac17,5 (Apple A18 Pro, 8.0 GB) · macOS 27.0.1 · Battery Power

Caveats for these results · Source code & methodology

Overall winner

🏆 Safari

by 21.1 points, weighted across 4 categories

Safari 27.0.1

96.9

overall score / 100

Vivaldi 8.2.4133.87

75.8

overall score / 100

Category scores

Best browser in each metric scores 100; the others score their ratio to it. Category = mean of its metrics.

SafariVivaldi

Speedweight 36% · Vivaldi wins

Safari

92.1

Vivaldi

99.5

Page loadsweight 29% · Safari wins

Safari

99.0

Vivaldi

65.6

Resource usageweight 21% · Safari wins

Safari

100.0

Vivaldi

64.6

Privacyweight 14% · Safari wins

Safari

100.0

Vivaldi

53.9

Speed

Speedometer 3.1 (web app responsiveness) higher is better · high confidence

Safari

45.1 score ±0.32

Vivaldi

50.8 score ±0.05

JetStream 2.2 (JavaScript & WebAssembly) higher is better · high confidence

Safari

461 score ±2.93

Vivaldi

454 score ±2.20

MotionMark 1.3 (graphics & animation) higher is better · high confidence

Safari

5,649 score ±71.7

Vivaldi

6,449 score ±45.7

Page loads

Time to first byte (cold) · 13 sites lower is better

Safari

219 ms ±23.3

Vivaldi

636 ms

First contentful paint (cold) · 14 sites lower is better

Safari

651 ms

Vivaldi

1,461 ms

Largest contentful paint (cold) · 14 sites lower is better

Safari

884 ms

Vivaldi

2,196 ms

DOMContentLoaded (cold) · 14 sites lower is better

Safari

782 ms ±64.8

Vivaldi

1,951 ms

Full page load (cold) · 12 sites lower is better

Safari

1,301 ms ±67.5

Vivaldi

3,850 ms

First contentful paint (warm) · 13 sites lower is better

Safari

339 ms ±23.3

Vivaldi

348 ms

Largest contentful paint (warm) · 13 sites lower is better

Safari

480 ms ±45.1

Vivaldi

468 ms

DOMContentLoaded (warm) · 14 sites lower is better

Safari

367 ms ±37.9

Vivaldi

368 ms

Full page load (warm) · 14 sites lower is better

Safari

626 ms ±67.5

Vivaldi

587 ms

Cold page load per site

googlelower is better

Safari

692 ms ±93.5

Vivaldi

18,694 ms ±8,997

githublower is better

Safari

957 ms ±29.4

Vivaldi

1,047 ms ±0.15

wikipedialower is better

Safari

3,623 ms ±79

Vivaldi

1,047 ms ±179

leetcodelower is better

Safari

893 ms ±35.2

Vivaldi

1,208 ms ±95.3

amazonlower is better

Safari

1,296 ms ±24.4

Vivaldi

1,784 ms

nytimeslower is better

Safari

1,198 ms ±149

Vivaldi

17,697 ms ±8,387

bbclower is better

Safari

1,030 ms ±70

Vivaldi

10,500 ms ±4,062

cnnlower is better

Safari

10,228 ms ±768

thevergelower is better

Safari

1,680 ms ±17.9

applelower is better

Safari

948 ms ±40.2

Vivaldi

16,836 ms ±7,945

espnlower is better

Safari

2,128 ms ±141

Vivaldi

14,898 ms ±6,379

mediumlower is better

Safari

1,758 ms ±61.1

Vivaldi

2,282 ms ±532

twitchlower is better

Safari

1,086 ms ±22.6

Vivaldi

1,174 ms

mdnlower is better

Safari

505 ms ±156

youtubelower is better

Safari

1,785 ms ±41.5

Vivaldi

1,923 ms ±20.8

redditlower is better

Vivaldi

1,115 ms ±87.2

stackoverflowlower is better

Vivaldi

8,472 ms ±2,861

imdblower is better

Vivaldi

1,641 ms ±15.5

Resource usage

Memory, idle (1 blank tab) lower is better · low confidence

Safari

954 MB ±473

Vivaldi

1,124 MB ±62.7

CPU, idle lower is better · high confidence

Safari

0.20 % core ±0.07

Vivaldi

0.80 % core ±0.03

Memory with 10 site tabs lower is better · high confidence

Safari

3,133 MB ±61.6

Vivaldi

5,060 MB ±579

Background CPU with 10 site tabs lower is better · high confidence

Safari

7.60 % core ±0.55

Vivaldi

38.6 % core ±8.57

Memory per extra tab lower is better · high confidence

Safari

227 MB ±43.4

Vivaldi

394 MB ±64.2

Processes with 10 tabs lower is better

Safari

28 ±1.75

Vivaldi

32 ±6

Privacy

Tracker requests (all sites) · 18 sites lower is better

Safari

15 requests

Vivaldi

150 requests

Third-party domains contacted (all sites) · 18 sites lower is better

Safari

53 domains ±0.25

Vivaldi

140 domains

Fingerprinting surfaces exposed lower is better

Safari

3 surfaces

Vivaldi

5 surfaces

Installed fonts visible to pages lower is better

Safari

45 fonts

Vivaldi

45 fonts

Fingerprint details

Attribute	Safari	Vivaldi
Canvas randomised	False	False
Audio randomised	False	False
GPU model exposed	True	True
WebGL renderer	Apple GPU	ANGLE (Apple, ANGLE Metal Renderer: Apple A18 Pro, Unspecified Version)
navigator.deviceMemory	None	8
CPU cores reported	4	6
UA client hints	False	True
Same fingerprint in new session	True	—
Fonts visible	45	45

Stability

Crashes lower is better

Safari

Hangs (> 5s unresponsive) lower is better

Safari

Tab responsiveness under load (p95) lower is better

Safari

479 ms

Time to open a tab under load (median) lower is better

Safari

1.31 s

Memory growth over the session lower is better

Safari

0 MB/min

Peak memory with 20 tabs lower is better

Safari

2,999 MB

Battery

Battery drain lower is better

Safari

397 mAh/h

Average battery power draw lower is better

Safari

1.35 W

Battery used per hour lower is better

Safari

5.65 %/h

Estimated battery life for this workload higher is better

Safari

24.5 h

Notes

Stability not scored: no data for Vivaldi (see errors).
Battery not scored: no data for Vivaldi (see errors).
Vivaldi · pageload · rep 1: TimeoutException: Message: timeout: Timed out receiving message from renderer: 45.000
Vivaldi · pageload · rep 4: TimeoutException: Message: timeout: Timed out receiving message from renderer: 45.000
Safari · pageload · rep 5: ReadTimeoutError: HTTPConnectionPool(host='localhost', port=54434): Read timed out. (read timeout=120)
Vivaldi · pageload · rep 5: TimeoutException: Message: timeout: Timed out receiving message from renderer: 45.000
Vivaldi · privacy · rep 1: TimeoutException: Message: timeout: Timed out receiving message from renderer: 45.000
Vivaldi · privacy · rep 2: TimeoutException: Message: timeout: Timed out receiving message from renderer: 45.000
Vivaldi · stability · rep 1: TimeoutException: Message: timeout: Timed out receiving message from renderer: 45.000
Vivaldi · battery · rep 1: TimeoutException: Message: timeout: Timed out receiving message from renderer: 45.000

Run history

Run	Mode	Versions	Winner	Scores
2026-10-16 21:45	full	Safari 27.0.1 vs Vivaldi 8.2.4133.87	Safari	Safari 96.9 / Vivaldi 75.8