Zero warm-up Guava RateLimiter

[kristofarkas]

What happened?

The default Guava RateLimiter initializer creates a rate limiter with 0 permits, and starts acquiring them. This causes an unexpected behaviour, where at the beginning of the rate limiters lifetime the rate limit is much lower that specified.

// rate limits way more aggressively than `permitsPerSecond` at start
RateLimiter.create(permitsPerSecond)

What did you want to happen?

Setting the warm up time to zero means that max permits are available at start.

RateLimiter.create(permitsPerSecond, Duration.ZERO)