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# XCTMemoryMetric

A metric to record the physical memory that a performance test uses.

```
class XCTMemoryMetric
```

## Overview

`XCTMemoryMetric` compares the memory use before and after running the block argument to [`measure(metrics:block:)`](/documentation/XCTest/XCTestCase/measure(metrics:block:)), and reports the difference.

## Topics

### Initializers

[`init()`](/documentation/XCTest/XCTMemoryMetric/init())

Initializes a metric that measures memory use in the current process.

[`init(application:)`](/documentation/XCTest/XCTMemoryMetric/init(application:))

Initializes a metric that measures memory use in the target app.


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