metrics

type Metrics struct {
	// contains filtered or unexported fields
}

type Stats struct {
	// Tokenization counts
	TokenizeOperations int64   `json:"tokenize_operations"`
	TokenizeErrors     int64   `json:"tokenize_errors"`
	TokenizeErrorRate  float64 `json:"tokenize_error_rate"`

	// Parser counts
	ParseOperations   int64   `json:"parse_operations"`
	ParseErrors       int64   `json:"parse_errors"`
	ParseErrorRate    float64 `json:"parse_error_rate"`
	StatementsCreated int64   `json:"statements_created"`

	// Tokenization performance metrics
	AverageTokenizeDuration     time.Duration `json:"average_tokenize_duration"`
	TokenizeOperationsPerSecond float64       `json:"tokenize_operations_per_second"`

	// Parser performance metrics
	AverageParseDuration     time.Duration `json:"average_parse_duration"`
	ParseOperationsPerSecond float64       `json:"parse_operations_per_second"`

	// Tokenizer pool metrics
	PoolGets     int64   `json:"pool_gets"`
	PoolPuts     int64   `json:"pool_puts"`
	PoolBalance  int64   `json:"pool_balance"`
	PoolMissRate float64 `json:"pool_miss_rate"`

	// AST pool metrics
	ASTPoolGets    int64 `json:"ast_pool_gets"`
	ASTPoolPuts    int64 `json:"ast_pool_puts"`
	ASTPoolBalance int64 `json:"ast_pool_balance"`

	// Statement pool metrics
	StmtPoolGets    int64 `json:"stmt_pool_gets"`
	StmtPoolPuts    int64 `json:"stmt_pool_puts"`
	StmtPoolBalance int64 `json:"stmt_pool_balance"`

	// Expression pool metrics
	ExprPoolGets    int64 `json:"expr_pool_gets"`
	ExprPoolPuts    int64 `json:"expr_pool_puts"`
	ExprPoolBalance int64 `json:"expr_pool_balance"`

	// Query size metrics
	MinQuerySize        int64   `json:"min_query_size"`
	MaxQuerySize        int64   `json:"max_query_size"`
	AverageQuerySize    float64 `json:"average_query_size"`
	TotalBytesProcessed int64   `json:"total_bytes_processed"`

	// Timing
	Uptime            time.Duration `json:"uptime"`
	LastOperationTime time.Time     `json:"last_operation_time"`

	// Error breakdown
	ErrorsByType map[string]int64 `json:"errors_by_type"`

	// Legacy field for backwards compatibility
	ErrorRate float64 `json:"error_rate"`
}