personal_newAccount very slow

[AdvancedStyle]

I'm running:

• Parity version: Parity/v1.9.0-unstable-52e2adc-20171019/x86_64-linux-gnu/rustc1.21.0
• Operating system: Ubuntu 16.04.3 LTS
• And installed: from source

Actual behavior:
When operating with a large keystore the personal_newAccount call gets extremely slow. It can take up to 1 minute or more to generate 1 new keyfile. (Tested with 150,000 keys)

Expected behavior:
personal_newAccount call should probably take less than 1 second to generate a key.

[Office-Julia]

Hello.
You've created a similar issue 4 days ago:
#6787

And there you mentioned you're using 'master' branch:
#6827

May I ask which parity version and branch you are actually using at the moment where you experience these problems?

[AdvancedStyle]

Issue occurs on all versions that I can remember...on 1.7.2, 1.7.6, 1.8.0, 1.9.0. But just did not bring it up before .

[AdvancedStyle]

After installing PR #6827 and delete/rsyncing the chain then this issue is fixed also.