To improve the initialization of operations, UNICOM^® Digital Transformation Toolkit (UDTT™) provides a mechanism of tag input stream cache. By default, the definition tags of operation will be cached once it is read by the UDTT runtime environment. This does improve the performance in runtime. But in the project or application developing phase, the tag definitions are always changed, thus developers always need the latest tag definitions.

UDTT also provides a cache switch to adapt this requirement. The switch is defined under operation section in btt.xml. Its name is tagInputStreamCache and valid values include “true” and “false”. If the switch is not defined, the tag input streams are always cached which means the default value for this switch is true. Here is a snippet definition for this part:

To improve the performance, the tag input stream cache should be enabled while application or project on production.