new file: README.md

Author: 0xGingi

README.md

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+# DNSpeedTest
+
+A fast, lightweight DNS resolver benchmarking tool written in Rust that measures the performance of popular DNS providers.
+
+## Features
+
+- Tests multiple popular DNS providers including Google, Cloudflare, Quad9, OpenDNS, and more
+- Measures average response time, minimum and maximum latency
+- Calculates success rate for DNS queries
+- Tests against commonly accessed domains
+- Provides detailed performance metrics in an easy-to-read format
+- Initial connection latency testing for each provider
+
+## Build from source
+
+1. Make sure you have Rust installed on your system
+2. Clone this repository
+```
+
+        git clone https://github.com/0xgingi/dnspeedtest
+        cd dnspeedtest
+```
+3. Build and run:
+```
+        cargo build --release
+        cargo run
+```
+## Configuration
+
+The tool comes pre-configured with several popular DNS providers and test domains. You can modify these in the source code:
+
+- `DNS_PROVIDERS`: List of DNS providers to test
+- `TEST_DOMAINS`: List of domains to query during testing
+- `TEST_ROUNDS`: Number of test iterations (default: 3)