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I'm trying to run some rpc tests for staking. I'm using the polkadot binary with --dev, which works reasonably well, except that the epoch/bonding timings are way too long for testing/development. I can't seem to set these via the command line parameters. I also tried polkadot build-spec --dev, but the resulting json doesn't seem to have these parameters, or at least that I can recognize.

Is there an easy way to configure the chain parameters (most of the things found here: https://wiki.polkadot.network/docs/maintain-polkadot-parameters) for a dev node?

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cargo build --release --features fast-runtime
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    Thanks. I compiled with the fast-runtime feature and it created a binary with faster epoch/era/etc times. Then I looked in the code and the values for various parameters can be configured at compile time with environment variables. I don't believe these are documented anywhere. They can be found in runtime/src/polkadot/lib.rs by searching for prod_or_fast. For example, DOT_EPOCH_DURATION sets the epoch duration.
    – Moh Rezaei
    Apr 16, 2022 at 17:57

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