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Packet Number Encryption Performance

Nick Banks <nibanks@microsoft.com> Thu, 21 June 2018 20:48 UTC

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From: Nick Banks <nibanks@microsoft.com>
To: "quic@ietf.org" <quic@ietf.org>
Subject: Packet Number Encryption Performance
Thread-Topic: Packet Number Encryption Performance
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Date: Thu, 21 Jun 2018 20:48:00 +0000
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Hello QUIC WG,

I recently implemented PNE for WinQuic (using bcrypt APIs) and I decided to get some performance numbers to see what the overhead of PNE was. I figured the rest of the WG might be interested.

My test just encrypts the same buffer (size dependent on the test case) 10,000,000 times and measured the time it took. The test then did the same thing, but also encrypted the packet number as well. I ran all that 10 times in total. I then collected the best times for each category to produce the following graphs and tables (full excel doc attached):

[cid:image003.png@01D40966.7655B6B0]


Time (ms)

Rate (Mbps)

Bytes

NO PNE

PNE

PNE Overhead

No PNE

PNE

4

2284.671

3027.657

33%

140.064

105.692

16

2102.402

2828.204

35%

608.827

452.584

64

2198.883

2907.577

32%

2328.45

1760.92

256

2758.3

3490.28

27%

7424.86

5867.72

600

4669.283

5424.539

16%

10280

8848.68

1000

6130.139

6907.805

13%

13050.3

11581.1

1200

6458.679

7229.672

12%

14863.7

13278.6

1450

7876.312

8670.16

10%

14727.7

13379.2


I used a server grade lab machine I had at my disposal, running the latest Windows 10 Server DataCenter build. Again, these numbers are for crypto only. No QUIC or UDP is included.

Thanks,
- Nick

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