Wallet responsiveness is sluggish

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If a wallet contains many addresses (eg >50) with each address containing lots of inputs (eg >50) and staking is enabled, the UI responsiveness of the wallet is very sluggish and difficult to operate.

When you disable staking,
or
When you spend all the inputs (consumed by staking for example)
The UI responsiveness returns to normal

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As reported on BitcoinUnlimited there are some optimisations that can be made to improve performance. https://medium.com/@g.andrew.stone/optimizing-bitcoins-transaction-generation-code-92bd222bae85#.xj05p9fwh