That "wait for something else" normally refers to <abbr title="Input and Output">I/O</abbr> operations that are relatively "slow" (compared to the speed of the processor and the RAM memory), like waiting for:

* the data from the client to be sent through the network
* the data sent by your program to be received by the client through the network

  @Generates
  <T extends @Nullable Object> Ordering<T> generateOrdering() {
    return new Ordering<T>() {
      @Override
      @SuppressWarnings("UnusedVariable") // intentionally weird Comparator
      public int compare(T left, T right) {
        return 0;
      }

      final String string = paramString(Ordering.class, generateInt());

      @Override
      public String toString() {
        return string;
      }

    }

    /**
     * Configures this {@code Builder} to order entries by value according to the specified
     * comparator.
     *
     * <p>The sort order is stable, that is, if two entries have values that compare as equivalent,
     * the entry that was inserted first will be first in the built map's iteration order.
     *
     * @throws IllegalStateException if this method was already called
     * @since 19.0
     */

	// Prefer lower types
	if x.Type != o.Type {
		return x.Type < o.Type
	}
	// Consistent sort on signature
	if v := bytes.Compare(x.Signature[:], o.Signature[:]); v != 0 {
		return v > 0
	}
	// On ID mismatch
	if v := bytes.Compare(x.VersionID[:], o.VersionID[:]); v != 0 {
		return v > 0
	}
	// Flags
	if x.Flags != o.Flags {
		return x.Flags > o.Flags
	}
	return false
}

  @Generates
  <T extends @Nullable Object> Ordering<T> generateOrdering() {
    return new Ordering<T>() {
      @Override
      @SuppressWarnings("UnusedVariable") // intentionally weird Comparator
      public int compare(T left, T right) {
        return 0;
      }

      final String string = paramString(Ordering.class, generateInt());

      @Override
      public String toString() {
        return string;
      }

Linux containers run using the same Linux kernel of the host (machine, virtual machine, cloud server, etc). This just means that they are very lightweight (compared to full virtual machines emulating an entire operating system).

This way, containers consume **little resources**, an amount comparable to running the processes directly (a virtual machine would consume much more).

//
// They are consumed by the kube-scheduler when a CSI driver opts into
// capacity-aware scheduling with CSIDriverSpec.StorageCapacity. The scheduler
// compares the MaximumVolumeSize against the requested size of pending volumes
// to filter out unsuitable nodes. If MaximumVolumeSize is unset, it falls back
// to a comparison against the less precise Capacity. If that is also unset,

		oVer := oVers.versions[i]
		if eVer.header != oVer.header {
			if eVer.header.hasEC() != oVer.header.hasEC() {
				// One version has EC and the other doesn't - may have been written later.
				// Compare without considering EC.
				a, b := eVer.header, oVer.header
				a.EcN, a.EcM = 0, 0
				b.EcN, b.EcM = 0, 0
				if a == b {
					continue
				}
			}

      return true;
    } else if (obj instanceof MediaType) {
      MediaType that = (MediaType) obj;
      return this.type.equals(that.type)
          && this.subtype.equals(that.subtype)
          // compare parameters regardless of order
          && this.parametersAsMap().equals(that.parametersAsMap());
    } else {
      return false;
    }
  }

  @Override
  public int hashCode() {

//
// They are consumed by the kube-scheduler when a CSI driver opts into
// capacity-aware scheduling with CSIDriverSpec.StorageCapacity. The scheduler
// compares the MaximumVolumeSize against the requested size of pending volumes
// to filter out unsuitable nodes. If MaximumVolumeSize is unset, it falls back
// to a comparison against the less precise Capacity. If that is also unset,