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A Comparison of HTTP and HTTPS Performance

A Comparison of HTTP and HTTPS Performance. Arthur Goldberg, Robert Buff, Andrew Schmitt [artg, buff, schm7136]@cs.nyu.edu Computer Science Department Courant Institute of Mathematical Science New York University. Computer Measurement Group, December 8, 1998. Outline.

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A Comparison of HTTP and HTTPS Performance

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  1. A Comparison of HTTP and HTTPS Performance Arthur Goldberg, Robert Buff, Andrew Schmitt [artg, buff, schm7136]@cs.nyu.edu Computer Science Department Courant Institute of Mathematical Science New York University Computer Measurement Group, December 8, 1998

  2. Outline • Review of secure Web communications • Experimental design • HTTP and HTTPS performance • Conclusions

  3. HTTP Transaction Client Browser Web Server TCP Connect HTTP GET transaction

  4. Measured Calls Socket = TCP-connect( URL ); start-timer; TCP-write( HTTP-Request ); while ( data-available ) { TCP-read( HTTP-Response ); } end-timer;

  5. HTTPS HTTPS SSL TCP

  6. HTTPS Transaction Client Browser Web Server TCP Connect SSL Connect HTTPS GET transaction

  7. Measured Calls Socket = TCP-connect( URL ); SSL-connect( Socket ); start-timer; SSL-write( HTTP-Request ); while ( data-available ) { SSL-read( HTTP-Response ); } end-timer;

  8. Secure Performance Issues • Comparison of HTTP and HTTPS GETs • SSL connect delay

  9. WebPerf System • Robot browser • HTTP 1.0 • Proxies • SSL • Oracle 7.3 SQL 92 Database • Experiments • Results

  10. Robot Browser Implementation • Visual C++ 5.0, optimized • Single-threaded • Winsock 1.1 • SSLeay 0.8.1 (by Eric A. Young) • RogueWave and Oracle OCI

  11. Experimental Setup • Intranet: Robot PC and Server PC • Measured downloads in • HTTP • HTTPS export grade encryption (40 bit keys) • HTTPS domestic grade encryption (128 bit keys)

  12. Robot PC • Windows NT Workstation 4.0 • 100 MHz Pentium, 32 MB,NE 2000 NIC • 10 Mbps Ethernet • Connected to server viaunswitched hub

  13. Server PC • Netscape Enterprise Server 3.5.1 • Microsoft Internet Information Server (IIS) 4.0 • Windows NT Server 4.0 • 200 MHz Pentium, 256 MB, 100baseT Ethernet NIC

  14. Downloaded documents • Prefix of HTTP Specificationin HTML • Sizes in KB: 1, 2, 3, …, 18, 19, 20 40, 60, 80, 100

  15. 95% 75% Duration (100K) Non-secure Secure (40) Secure (128) ms Netscape 200 150 100 50 Microsoft 200 150 100 50 20 60 100 20 60 100 20 60 100

  16. 95% 75% Duration (20K) Non-secure Secure (40) Secure (128) ms Netscape 100 60 20 Microsoft 100 60 20 0510 1520 0510 1520 0510 1520

  17. Conclusion • HTTPS only slightly slower than HTTP

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