Is Hyperthreading better, neutral, or worse for scrypt calculations?

[ripper234]

To get optimal performance, should one turn hyperthreading on or off?

One advantage of HT is that if I want to not run all my cores, because I'm using the computer, and I don't trust that putting the process on "Low Priority" is good enough, then with HT I can mine with 7/8 "cores", while without it I have to choose between 3/4 and 4/4.

Raw performance wise, how does HT affect mining speed?
LiteCoin is right around the corner.

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[bulanula]

Interested in this as well.

[Bobnova]

In linux64 on a 2600k with default compiling options, HT doesn't help or hurts performance.
In linux64 on a 2600k with AVX enabled in compilation of the client, HT helps significantly.

[grod]

i7 920 on linux64, -march=native -O3 -msse4.2:  HT yields 1% more hash at a cost of about 3 degrees more per core.

[bulanula]

In linux64 on a 2600k with default compiling options, HT doesn't help or hurts performance.
In linux64 on a 2600k with AVX enabled in compilation of the client, HT helps significantly.

Can you please tell us your compile options and your khash/s. Thanks !

[panerai]

I'm a Windows guy. Not sure if you guys can help me with HT also. I wish there was a list of minerd switches I can play with

[Bobnova]

They're already in the TBX and "what speed are you mining TBX?" threads Bula.