feat: added optional profiling

internal/config/config.go

@@ -2,10 +2,8 @@ package config
 
 // Arguments given to program.
 type Config struct {
-	// The source code given to the program.
-	Source Source
-	// Whether or not to print debug logs.
-	Verbose bool
-	// Whether or not to print an explanation of the reduction.
-	Explanation bool
+	Source      Source // The source code given to the program.
+	Verbose     bool   // Whether or not to print debug logs.
+	Explanation bool   // Whether or not to print an explanation of the reduction.
+	Profile     string // If not nil, print a CPU profile during execution.
 }

internal/config/parse_from_args.go

@@ -10,6 +10,7 @@ func FromArgs() (*Config, error) {
 	// Parse flags.
 	verbose := flag.Bool("v", false, "Verbosity. If set, the program will print logs.")
 	explanation := flag.Bool("x", false, "Explanation. Whether or not to show all reduction steps.")
+	profile := flag.String("p", "", "CPU profiling. If set, the program will run a performance profile during execution.")
 	flag.Parse()
 
 	// Parse non-flag arguments.
@@ -31,5 +32,6 @@ func FromArgs() (*Config, error) {
 		Source:      source,
 		Verbose:     *verbose,
 		Explanation: *explanation,
+		Profile:     *profile,
 	}, nil
 }