On JVM only, I need to create an OutputStream to w...

# io

[hfhbd]

On JVM only, I need to create an OutputStream to write 10 MB (data comes from memory, json encoding) over the wire. Should I use ByteArrayOutputStream or kotlinx Buffer and asOutputSource? Are there any performance differences?

[Filipp Zhinkin]

So there's an API accepting an OutputStream and writing data into it; then that data needs to be transferred over the wire, did I get it correctly?

[hfhbd]

Yes

[Klitos Kyriacou]

Do you have to write to an in-memory buffer first? Isn't there an OutputStream that writes directly over the wire? (Such as Socket.getOutputStream())?

[hfhbd]

AFAIk yes, (using Apache Camel with streamcache disabled). There is only an api to set an outputstream but no api to get one.

[hfhbd]

But good hint, will check it again if I can get an outputstream

[Filipp Zhinkin]

I have a prerecorded answer: it all depends, it's better to measure how it works for your particular case 😉

Although, answering the original question, I expect that writing to a ByteArrayOutputStream initialized with a buffer large enough to fit the whole JSON document will be faster.

[hfhbd]

Thank you, I did check it and I really need to create the outputstream by myself. And I will start using the ByteArrayOutputstream, and maybe will test it later 😅