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mmap should outperform anything else (all things being equal) because the extra buffer copies from kernel to user space are avoided. As well as using C or C++, you should be able to use Java with the java.nio package for memory mapped I/O and it should be portable. I havn't tried it but it...

MyISAM. My knowledge of RDBs is slight, so I'm not really the best person to be handing out recommendations.

MySQL, Linux 2.6.15 kernel, Athlon 2800+, ordinary IDE drive: 7.24 seconds to select * from a 700K row table of tick data.

No, not impressive at all. There may be some advantages to DDR2 for AMD, but it seems that performance isn't one of them at the moment. I'm also interested to see how the Intel Conroes benchmark. I did read somewhere that the initial Conroes won't have 64 bit support. If in fact true, that...

One trade stopped out ? Two ? Five in a row ? How long would your account last.

An appreciation of risk.

Extensive review of new AMD socket AM2 CPUs: http://www.tomshardware.com/2006/05/23/amd_reinvents_itself/

SGXNK appears to have opened at 11:15 AM Singapore time. No bulletins from IB.

It's not javascript it's Java which is a totaly different thing.

I think debka is run by Israeli intelligence. One should therefor exercise a certain degree of caution in accepting it all as absolute truth.

Yes would be nice. Just the most recently expired contract would be good to have.

One other comment. Memory problems on PCs can sometimes exhibit themselves in the strangest ways. If the PC is new, it may just be possible there is some kind of memory problem. Get a copy of memtest86 (download for free) and run it for several hours on the PC when you don't need to use the...

Best to ask IB tech support, but here's my comments for free The first two messages are nothing to worry about. I get them all the time, and basically only use TWS for the API. The others look a bit odd to me. My recommendation is to download a new copy of TWS, reinstall it and contact IB...

It might have something to do with the cost of programmer time vs cost of machine time. It entirely depends on what you are doing. If it is fast enough and likely to remain so with forseeable change of circumstances, then one should obviously use the tool that gets the job done sooner.

If you want to experiment with neural nets, http://www.jooneworld.com is interesting, with a GUI for constructing nets, with input layers for Excel, SQL, Yahoo finance and others. Free with Java source code including distributed training if you ever get to the point of needing serious...

And you, sir, are a waste of internet bandwidth.

cscott, I hardly think hosting your own domain qualifies you to provide meaningful assessments of the lack (or otherwise) of redundancy in "most" companies setups. And it certainly doesn't justify some implied deficiency in InteractiveBrokers infrastructure by association with "most"...

An interesting exercise is to markup the pivot levels onto a chart with overlaid volume profile. My impression is that volume tends to cluster just above or just below a pivot level to a greater degree than what one could expect if it were just random. This proposition could be backtested and...

It starts TWS and logs in. You need all the appropriate jars in your classpath to run it. It's easier to build the thing in a Netbeans project and have it create a single jar containing jemmy, TWS - the lot. import org.netbeans.jemmy.*; import org.netbeans.jemmy.operators.*; public...

Presumably you want to login, not just start TWS. The easiest way I have found is to do it in Java using 'jemmy' from http://www.netbeans.org. Jemmy is a package for automating Java Swing GUI test harness. If you need a code fragment I can provide one. It's only a few lines of code.