boost iostreams and compression

Hello

I've been trying to figure out another way to compress data from/to std::stringstream.

Here is the source how I do it now:

Code:

---

std::stringstream decompressed;
 decompressed << "somestring.....";

 std::stringstream compressed;
 {
  boost::iostreams::filtering_streambuf<boost::iostreams::input> out;
  out.push(boost::iostreams::zlib_compressor());
  out.push(decompressed);
  boost::iostreams::copy(out, compressed);
 }

---

Is there any way around this?
I want to avoid boost::iostreams::copy because it takes 40% of this source execution time.
How can I compress data directly to stringstream (to compressed in this example) without copying it?

PS: i tried asking on boost user newsgroups, but noone replies

Thank you very much for help

Must have missed the post on boost-users.

Anyway, you mean that copy takes 40% of the time of this snippet? Actually, I'd expect it to use about 95% - it's the only part that does any work.

But you might try an array_sink instead of the stringstream as the target.

Could you give an example please?