Environment & Runtime

The System.Info unit provides access to the host environment, hardware specifications, and system-level metrics. It is essential for writing environment-aware scripts and performance profiling.

Application Environment

The ApplicationInfo object provides details about the running process.

// NO_RUN
PrintLn('User: ' + ApplicationInfo.UserName);
PrintLn('Directory: ' + ApplicationInfo.CurrentDirectory);

// Check if running in a debugger
if ApplicationInfo.IsDebuggerPresent then
  PrintLn('Debugging mode active');

Hardware & OS

You can query the CPU model, core count, and operating system details.

// NO_RUN
PrintLn('OS: ' + OSVersionInfo.Name + ' (' + OSVersionInfo.Version + ')');
PrintLn('CPU: ' + CPUInfo.Name);
PrintLn('Cores: ' + IntToStr(CPUInfo.Count));

// Monitor CPU usage
PrintLn('Global CPU Usage: ' + FloatToStr(CPUInfo.SystemUsage) + '%');
PrintLn('Process CPU Usage: ' + FloatToStr(CPUInfo.ProcessUsage) + '%');

Memory Monitoring

To check memory usage, instantiate the MemoryStatus class.

// NO_RUN
var mem := new MemoryStatus;
var freeMB := mem.Physical.Available div (1024 * 1024);
PrintLn('Available Physical Memory: ' + IntToStr(freeMB) + ' MiB');

var counters := ApplicationInfo.MemoryCounters();
PrintLn('Process Working Set: ' + IntToStr(counters.WorkingSetSize div 1024) + ' KiB');

Performance Profiling

The PerformanceCounter class provides a high-resolution timer for measuring the execution time of code blocks.

var pc := new PerformanceCounter;

// Simulate work
Sleep(150);

pc.Stop;
PrintLn(Format('Task completed in %.3f seconds', [pc.Elapsed]));

Result

Task completed in 0.151 seconds

Detailed Reference

For a complete list of all classes, properties, and records available in the system info unit, see the API reference:

System Info API Reference

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