With fast fallback, OkHttp attempts to connect to multiple web servers concurrently. It keeps whichever route connects first and cancels all of the others. Its rules are:

 * Prefer to alternate IP addresses from different address families, (IPv6 / IPv4), starting with IPv6.
 * Don't start a new attempt until 250 ms after the most recent attempt was started.
 * Keep whichever TCP connection succeeds first and cancel all the others.

    }

    @Keep
    protected void protectedOneArg(String s) {
      checkNotNull(s);
    }

    @Keep
    public void oneNullableArg(@Nullable String s) {}

    @Keep
    public void oneNullableArgThrows(@Nullable String s) {
      doThrow(s);
    }

    @Keep
    public void twoArg(String s, Integer i) {
      checkNotNull(s);
      i.intValue();
    }

    @Keep

Those two tasks are what **consume time the most**. That's the main work of maintaining FastAPI.

If you can help me with that, **you are helping me maintain FastAPI** and making sure it keeps **advancing faster and better**. 🚀

## Join the chat { #join-the-chat }

    @Size(max = 20)
    public String csvFileEncoding;

    /**
     * Number of days to keep search logs before purging.
     * Set to -1 to disable automatic purging of search logs.
     */
    @Min(-1)
    @Max(100000)
    @ValidateTypeFailure
    public Integer purgeSearchLogDay;

    /**
     * Number of days to keep job logs before purging.
     * Set to -1 to disable automatic purging of job logs.
     */

I will show you some of the main concepts you should probably keep in mind when deploying a **FastAPI** application (although most of it applies to any other type of web application).

    }

    @Keep
    public static final class DeterministicRandom extends Random {
      @Keep
      public DeterministicRandom() {
        super(0);
      }
    }

    @Keep
    public static final class DummyScheduledThreadPoolExecutor extends ScheduledThreadPoolExecutor {
      @Keep
      public DummyScheduledThreadPoolExecutor() {
        super(1);
      }
    }

    @Keep

    A;

    @Keep
    public void failToCheckNull(String s) {}
  }

  private interface AnInterface {}

  private abstract static class AnAbstractClass {
    @Keep
    public AnAbstractClass(String s) {}

    @Keep
    public void failsToCheckNull(String s) {}
  }

  private static class NoPublicStaticMethods {
    @Keep // To test non-public factory isn't used.

import com.google.common.collect.testing.features.FeatureUtilTest.ExampleFeature.NotTesterAnnotation;
import com.google.common.collect.testing.features.FeatureUtilTest.ExampleFeature.Require;
import com.google.errorprone.annotations.Keep;
import java.lang.annotation.Inherited;
import java.lang.annotation.Retention;
import java.lang.reflect.Method;
import java.util.Set;
import junit.framework.TestCase;

/**
 * @author George van den Driessche

# into ints.

# Throwables uses internal APIs for lazy stack trace resolution
-dontnote sun.misc.SharedSecrets
-keep class sun.misc.SharedSecrets {
  *** getJavaLangAccess(...);
}
-dontnote sun.misc.JavaLangAccess
-keep class sun.misc.JavaLangAccess {
  *** getStackTraceElement(...);
  *** getStackTraceDepth(...);
}

# FinalizableReferenceQueue calls this reflectively

          "woo.com.",
          "www",
          "x",
          ALMOST_TOO_LONG,
          ALMOST_TOO_MANY_LEVELS
          // keep-sorted end
          );

  private static final ImmutableSet<String> INVALID_NAME =
      ImmutableSet.of(
          // keep-sorted start
          " ",
          "",
          ".",
          "..",
          "...",
          "..bar.com",
          "..quiffle.com",