MAXScript Language Improvements in 3ds Max 5
A new Append method has been added to the string value class. It lets you append to a strings in place without creating intermediate string copies in memory. This reduces memory usage significantly when building a large incremental string out of smaller strings, for example when creating dynamic rollouts.
In versions prior 3ds Max 5, using the addition to a string created intermediate copies which would remain in memory until the next garbage collection. When creating large dynamic rollout, it would be possible to exceed the MAXScript memory limit.