Hi Joran, We are facing a similar performance problem as your million-entry-object.
May I ask you to explain a bit detail about the implementation of ”Buffer backed open addressed hash table “ Many thanks, ty 2012/7/13 Joran Greef <[email protected]> > To get a very rough idea of how much time your program spends in gc, you > can expose the gc by running node with the --nouse_idle_notification > --expose_gc flags and then call gc manually with "global.gc()" and time how > long that takes. > > I have a program where a single JS object was being used as a hash table > with a few million entries. When the gc would run, as far as I am aware, it > would iterate over every one of those entries and it would do this every > few seconds, each time pausing for about 500ms. I switched to a Buffer > backed open addressed hash table which is also more efficient in other > respects. > > > On Friday, July 13, 2012 3:10:50 AM UTC+2, Alexey Petrushin wrote: >> >> There are rumors that current Node.js (or, more exactly V8 GC) performs >> badly when there are lots of JS objects and memory used. >> >> Can You please explain what exatly is the problem - lots of objects or >> lots of properties on one object (or array)? >> >> Maybe there are some benchmarks, would be interesting to see actual code >> and numbers. >> >> As far as I know the main problem - lots of properties on one object, not >> lots of objects itself (although I'm not sure). If so - would be the >> in-memory graph database (about couple of hundreds of properties on each >> node at max) a good case? >> >> Also I heard that latest versions of V8 has improved GC and that it >> solved some parts of this problems - is this true, and when it will be >> available in Node.js? >> > -- > Job Board: http://jobs.nodejs.org/ > Posting guidelines: > https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines > You received this message because you are subscribed to the Google > Groups "nodejs" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/nodejs?hl=en?hl=en > -- Job Board: http://jobs.nodejs.org/ Posting guidelines: https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines You received this message because you are subscribed to the Google Groups "nodejs" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nodejs?hl=en?hl=en
