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# Document Translation Performance Tests
In order to run the performance tests, the `devtools_testutils` package must be installed. This is done as part of the `dev_requirements` install.
Start by creating a new virtual environment for your perf tests. This will need to be a Python 3 environment, preferably >=3.7.
### Setup for test resources
The following environment variable will need to be set for the tests to access the live resources:
```
DOCUMENT_TRANSLATION_ENDPOINT=<translation-endpoint>
DOCUMENT_TRANSLATION_STORAGE_NAME=<storage-blob-account-name>
DOCUMENT_TRANSLATION_STORAGE_KEY=<storage-shared-key>
```
### Setup for perf test runs
```cmd
(env) ~/azure-ai-translation-document> pip install -r dev_requirements.txt
(env) ~/azure-ai-translation-document> pip install -e .
```
## Test commands
When `devtools_testutils` is installed, you will have access to the `perfstress` command line tool, which will scan the current module for runable perf tests. Only a specific test can be run at a time (i.e. there is no "run all" feature).
```cmd
(env) ~/azure-ai-translation-document> cd tests/perfstress_tests/
(env) ~/azure-ai-translation-document/tests/perfstress_tests> perfstress
```
Using the `perfstress` command alone will list the available perf tests found.
### Common perf command line options
These options are available for all perf tests:
- `--duration=10` Number of seconds to run as many operations (the "run" function) as possible. Default is 10.
- `--iterations=1` Number of test iterations to run. Default is 1.
- `--parallel=1` Number of tests to run in parallel. Default is 1.
- `--warm-up=5` Number of seconds to spend warming up the connection before measuring begins. Default is 5.
- `--sync` Whether to run the tests in sync or async. Default is False (async). This flag must be used for Storage legacy tests, which do not support async.
- `--no-cleanup` Whether to keep newly created resources after test run. Default is False (resources will be deleted).
## Example command
```cmd
(env) ~/azure-ai-translation-document/tests/perfstress_tests> perfstress TranslationPerfStressTest
```
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