# Specs and limits

{% hint style="warning" %}
The synthetic variables engine's computational speed is heavily influenced by the complexity of the synthetic expression, which results in calculation times ranging from a few seconds to a few minutes, or even an hour. If your synthetic variable is tied to a logic that is business critical, we recommend using another approach to compute it, such as an UbiFunction.
{% endhint %}

|    Item    |                             Description                             |       Value      |
| :--------: | :-----------------------------------------------------------------: | :--------------: |
| Characters | The limit of characters supported in the synthetic variable editor. | 1000 characters. |