---
id: more-test-optimization
title: Test execution time
---

By default, this module will check if you have a local installation of Tesseract on your machine/in your pipeline. If you don't have a local installation it will automatically use a [NodeJS](https://github.com/naptha/tesseract.js) version. This might cause some slowness because the image processing will be done by Node.js. NodeJS is not the best system to do
heavy processing.

**BUT....**, there are ways to optimize the execution time. Let's take the following test script

```ts
import { browser } from "@wdio/globals";

describe("Search", () => {
    it("be able to search for a value", async () => {
        await browser.url("https://webbrowser.io");
        await browser.ocrClickOnText({
            text: "Search",
        });
        await browser.ocrSetValue({
            text: "docs",
            value: "specfileretries",
        });
        await browser.ocrWaitForTextDisplayed({
            text: "specFileRetries",
        });
    });
});
```

When you execute this for the first time you might see the following results where it took 5.9 seconds to finish the test.

```log
npm run wdio -- --logLevel=silent

> ocr-demo@1.0.0 wdio
> wdio run ./wdio.conf.ts --logLevel=silent


Execution of 1 workers started at 2024-05-26T04:52:53.405Z

[0-0] RUNNING in chrome - file:///test/specs/test.e2e.ts
[0-0] Estimating resolution as 182
[0-0] Estimating resolution as 124
[0-0] Estimating resolution as 126
[0-0] PASSED in chrome - file:///test/specs/test.e2e.ts

 "spec" Reporter:
------------------------------------------------------------------
[chrome 125.0.6422.78 mac #0-0] Running: chrome (v125.0.6422.78) on mac
[chrome 125.0.6422.78 mac #0-0] Session ID: d281dcdc43962b95835aea8f64cab6c7
[chrome 125.0.6422.78 mac #0-0]
[chrome 125.0.6422.78 mac #0-0] » /test/specs/test.e2e.ts
[chrome 125.0.6422.78 mac #0-0] Search
[chrome 125.0.6422.78 mac #0-0]    ✓ be able to search for a value
[chrome 125.0.6422.78 mac #0-0]
[chrome 125.0.6422.78 mac #0-0] 1 passing (5.9s)


Spec Files:      1 passed, 1 total (100% completed) in 00:00:08
```

## Cropping the search area of a screen

You can optimize the execution time by providing a cropped area to execute the OCR on.

If you would then change the script to this:

```ts
import { browser } from "@wdio/globals";

describe("Search", () => {
    it("be able to search for a value", async () => {
        await browser.url("https://webdriver.io");
        await driver.ocrClickOnText({
            haystack: $(".DocSearch"),
            text: "Search",
        });
        await driver.ocrSetValue({
            haystack: $(".DocSearch-Form"),
            text: "docs",
            value: "specfileretries",
        });
        await driver.ocrWaitForTextDisplayed({
            haystack: $(".DocSearch-Dropdown"),
            text: "specFileRetries",
        });
    });
});
```

Then you will see a different execution time.

```log
npm run wdio -- --logLevel=silent

> ocr-demo@1.0.0 wdio
> wdio run ./wdio.conf.ts --logLevel=silent


Execution of 1 workers started at 2024-05-26T04:56:55.326Z

[0-0] RUNNING in chrome - file:///test/specs/test.e2e.ts
[0-0] Estimating resolution as 182
[0-0] Estimating resolution as 124
[0-0] Estimating resolution as 124
[0-0] PASSED in chrome - file:///test/specs/test.e2e.ts

 "spec" Reporter:
------------------------------------------------------------------
[chrome 125.0.6422.78 mac #0-0] Running: chrome (v125.0.6422.78) on mac
[chrome 125.0.6422.78 mac #0-0] Session ID: c6cb1843535bda3ee3af07920ce232b8
[chrome 125.0.6422.78 mac #0-0]
[chrome 125.0.6422.78 mac #0-0] » /test/specs/test.e2e.ts
[chrome 125.0.6422.78 mac #0-0] Search
[chrome 125.0.6422.78 mac #0-0]    ✓ be able to search for a value
[chrome 125.0.6422.78 mac #0-0]
[chrome 125.0.6422.78 mac #0-0] 1 passing (4.8s)


Spec Files:      1 passed, 1 total (100% completed) in 00:00:08
```

:::tip Cropping images
This reduced the local execution time from **5.9** to **4.8 seconds**. This is a reduction of almost **19%**. Imagine what it can do for a larger script with more data on it.
:::

## Using a local installation of Tesseract

You can speed up your execution time to even less than a minute if you have a local installation of Tessarect on your local machine and or in your pipeline (more information about installing Tesseract on your local system can be found [here](https://tesseract-ocr.github.io/tessdoc/Installation.html)). You can find the execution time of the same script using a local installation of Tesseract below.

```log
npm run wdio -- --logLevel=silent

> ocr-demo@1.0.0 wdio
> wdio run ./wdio.conf.ts --logLevel=silent


Execution of 1 workers started at 2024-05-26T04:59:11.620Z

[0-0] RUNNING in chrome - file:///test/specs/test.e2e.ts
[0-0] PASSED in chrome - file:///test/specs/test.e2e.ts

 "spec" Reporter:
------------------------------------------------------------------
[chrome 125.0.6422.78 mac #0-0] Running: chrome (v125.0.6422.78) on mac
[chrome 125.0.6422.78 mac #0-0] Session ID: 87f8c1e949e15a383b902e4d59b1f738
[chrome 125.0.6422.78 mac #0-0]
[chrome 125.0.6422.78 mac #0-0] » /test/specs/test.e2e.ts
[chrome 125.0.6422.78 mac #0-0] Search
[chrome 125.0.6422.78 mac #0-0]    ✓ be able to search for a value
[chrome 125.0.6422.78 mac #0-0]
[chrome 125.0.6422.78 mac #0-0] 1 passing (3.9s)


Spec Files:      1 passed, 1 total (100% completed) in 00:00:06
```

:::tip Local installation
This reduced the local execution time from **5.9** to **3.9 seconds**. This is a reduction of almost **34%**. Imagine what it can do for a larger script with more data on it.
:::