| --- |
| id: functions-runtime |
| title: Configure function runtime |
| sidebar_label: "Configure function runtime" |
| --- |
| |
| Pulsar supports three types of [function runtime](functions-concepts.md#function-runtime) with different costs and isolation guarantees to maximize the deployment flexibility of your functions. |
| |
| The following table outlines the supported programming languages for each type of function runtime. |
| |
| | Function runtime | Supported programming languages of functions | |
| |----------------------------------------------------|----------------------------------------------| |
| | [Thread runtime](functions-runtime-thread.md) | Java | |
| | [Process runtime](functions-runtime-process.md) | Java, Python, Go | |
| | [Kubernetes runtime](functions-runtime-kubernetes.md) | Java, Python, Go | |
| |
| :::note |
| |
| For the runtime Java version, refer to [Pulsar Runtime Java Version Recommendation](https://github.com/apache/pulsar/blob/master/README.md#pulsar-runtime-java-version-recommendation) according to your target Pulsar version. |
| |
| ::: |
