multithreading - C++ Class design for Multi threaded application -

i working on console application , need suggestions in design. - priority being, performance.

class 1

class get_data_from_internet{    // gets data internet.     // html source, data stored in flat file.  } 

this class gets data internet using sockets.

class 2

class process_html_format_one {   // class processes data of html file generated above using format one.    // example, format processes html text of yahoo.com       // remove unnecessary html tags.        // extract required information.        // fill structure (struct) data.        // update database. } 

the above class processes data of website in perticular format.

class 3

class process_html_format_two {   // class processes data of html file using format two.    // example, format processes html text of msn.com       // remove unnecessary html tags.        // extract required information.        // fill structure (struct) data.        // update database. } 

the above class processes data of website 2 in predefined format. there atleast dozen of such html format classes, selected & used per url's.

class 4

class start_monitoring {   // url's db. (around 1000 + url's)   // call "get_data_from_internet" each url.    // process each text file using of formats specified/defined above.  } 

the above class retrieves list of url's db , should process each url accordingly.

requirement 1. start_monitoring class must process each url spawning thread each better performance (to fetch near real time data). (should fine or make things worse ? each thread processes own data, think there shouldnt issues this.) 2. using c++ threads fine in case? because, cant use posix threads of functionality binded in individual classes/sub classes. 3. other alternatives should try looking for?

any advice in regard highly appreciated.