[Paul Offord <Paul.Offord@xxxxxxxxxxxx>]

Hi,

 

I recently measured some load and filter times with and without a LUA postdissector plugin called TRANSUM.  I tried three different scenarios:

 

·        No LUA - without any plugins other than those shipped as standard

·        Bypassed LUA – with TRANSUM but a preference set so that on entry to the postdissector immediately returns to Wireshark

·        LUA Enabled – with TRANSUM enabled

 

The test file was a 47MB pcapng file with mostly web traffic.  Almost all of the data packets would have been scrutinised by TRANSUM in some detail.

 

I timed loading the file and then filtering with the expresssion tcp.len>0.  The timings were:

 

	No LUA	Bypassed LUA	LUA Enabled
Load of file	1.0s	2.5s	5.4s
Filter with tcp.len>0	1.7s	2.9s	5.2s

 

The thing that surprised me was the impact of just having the LUA loaded, even if it immediately returned to Wireshak (the Bypassed LUA scenario).

 

Not a problem – just an observation.

 

Best regards…Paul

 

Paul Offord FBCS CITP
Chief Technical Officer
Advance7

Phone:  01279 211 668
Mobile:  07764 931 431
Email:  paul.offord@xxxxxxxxxxxx
LinkedIn:  https://uk.linkedin.com/in/paulofford

 

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