What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Create a testng.xml suite, set a parallel mode on the <suite> element, and specify thread-count. The mode determines which tests can run at the same time; choose it according to how much state your tests share.
Build the suite XML
TestNG uses a suite XML file to group tests. Put one or more <test> elements inside the root <suite>. Each test can select classes by fully qualified class name or select a package. Classes named in the XML should contain TestNG annotations. See the TestNG project documentation for suite structure and execution settings.
<!DOCTYPE suite SYSTEM "https://testng.org/testng-1.0.dtd">
<suite name="ParallelSuite" parallel="tests" thread-count="4">
<test name="Regression">
<classes>
<class name="com.example.tests.LoginTest"/>
<class name="com.example.tests.CheckoutTest"/>
</classes>
</test>
</suite>Save it as testng.xml in the location your build tool, IDE, or CI configuration expects. Replace the example class names with classes available on the test runtime classpath. This example selects parallel="tests", but contains only one <test> block; to schedule multiple test groups against one another in this mode, define additional <test> elements.
Choose the parallel mode
The mode is the unit TestNG schedules concurrently. The documented behavior of the main modes is described in the TestNG documentation.
The Tool Desk
Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
| Mode | What can run concurrently | What stays together | When it may fit |
|---|---|---|---|
methods |
Test methods | Dependency ordering is respected; methods in a class are not guaranteed to share one thread. | Methods are independent and their fixtures and data are safe to use concurrently. |
tests |
Separate <test> blocks |
Methods within one <test> run in one thread. |
You want to group classes that should remain on the same thread while running separate groups concurrently. |
classes |
Separate classes | Methods of the same class stay in one thread. | Classes can run independently, while each class should execute on one thread. |
instances |
Instances, according to the selected TestNG version and use case | Do not assume behavior beyond the version-specific documentation. | Use only after checking the exact instance behavior for your TestNG version. |
Prefer the narrowest mode that meets the runtime goal. Concurrent work can expose unsafe shared mutable state, browser sessions, fixtures, or external test data. TestNG’s scheduling mode does not itself make those resources independent.
Set the thread limit
With a parallel mode selected, thread-count sets the maximum number of threads used for tests. It does not enable parallel execution on its own: specify both the mode and the limit in the suite.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
<suite name="ParallelSuite" parallel="classes" thread-count="3">The command-line option -threadcount sets a default maximum and can be overridden by the suite definition. Treat the configured count as a ceiling, not a promise that every thread will always be busy; available independent work and resource limits affect actual concurrency.
Run data-provider invocations in parallel
Data-provider parallelism has its own control. Mark the provider with @DataProvider(parallel = true) to run its invocations in parallel. TestNG documents a default pool size of 10 for each parallel data provider running from an XML file; this is a configuration default, not a performance result. The pool can be changed with data-provider-thread-count. Check the TestNG documentation for the applicable suite settings.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
Starting with TestNG 7.9.0, share-thread-pool-for-data-providers and use-global-thread-pool provide suite-level shared-pool controls. The TestNG parameters documentation says to use testng-1.1.dtd for IDE completion of these settings. Confirm the project’s TestNG version before adding these attributes or changing the suite DTD; projects on earlier versions should not assume they are supported.
Run the suite
When TestNG is on the classpath, the documented command-line invocation is:
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
java org.testng.TestNG testng.xmlA build tool, IDE, or CI job may supply its own classpath and suite invocation. Use the project’s existing test configuration if it does, and ensure the XML file is included in that invocation.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Troubleshoot common problems
- Nothing runs concurrently: Check that
parallelis set on<suite>. Athread-countwithout a parallel mode does not select parallel execution. Forparallel="tests", also check that the suite has multiple<test>blocks. - TestNG cannot find a class: Verify the fully qualified name, spelling and package, then confirm the class is on the runtime classpath and contains TestNG annotations.
- Parallel tests interfere with each other: Look for shared mutable fields, common browser sessions, fixtures, files, or external records. Isolate those resources or choose a mode that keeps the relevant work together.
- A data provider does not run in parallel: Confirm it uses
@DataProvider(parallel = true); suite-level parallel mode and data-provider parallelism are separate controls. - A newer pool attribute is rejected or lacks IDE completion: Confirm TestNG is version 7.9.0 or newer for the shared-pool controls and use the documented
testng-1.1.dtdwhen IDE completion for them is needed. - The command does not launch the suite: Confirm TestNG is on the classpath and that
testng.xmlis at the path passed to the command. If a build tool or IDE runs the tests, configure the suite there instead.
Or skip the browser setup:
If your test workflow also needs website screenshots, ScreenshotNeo offers a screenshot API and MCP server. A single GET request can return an image or PDF; for example, this cURL request saves a WebP screenshot:
Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsQuick Recap
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://stripe.com -o shot.webpSee the ScreenshotNeo API documentation for parameters. It removes cookie/consent banners, newsletter popups and chat widgets before capture; bot checks, blank pages and failed loads are not billed. Its MCP server lets AI agents take screenshots. The Free plan includes 1,000 screenshots a month with no card, and paid plans start at $5 for 3,000. Sign up free.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
