| import type { TwinAudit, Finding } from './types.js'; | |
| export function auditPerformance(sourceFiles: { name: string; content: string }[]): TwinAudit { | |
| const findings: Finding[] = []; | |
| let idCounter = 0; | |
| for (const file of sourceFiles) { | |
| const lines = file.content.split('\n'); | |
| for (let i = 0; i < lines.length; i++) { | |
| const line = lines[i]; | |
| if (/while\s*\(\s*true\s*\)/.test(line) && !line.includes('break')) { | |
| findings.push({ | |
| id: `PERF-${String(++idCounter).padStart(3, '0')}`, | |
| severity: 'high', | |
| category: 'infinite_loop', | |
| description: `${file.name}:${i + 1} — Potential infinite loop without break`, | |
| file: file.name, line: i + 1, | |
| remediation: 'Add termination condition or timeout' | |
| }); | |
| } | |
| if (/JSON\.parse/.test(line) && !line.includes('try')) { | |
| const surrounding = lines.slice(Math.max(0, i - 2), Math.min(lines.length, i + 3)).join('\n'); | |
| if (!surrounding.includes('try')) { | |
| findings.push({ | |
| id: `PERF-${String(++idCounter).padStart(3, '0')}`, | |
| severity: 'medium', | |
| category: 'uncaught_parse', | |
| description: `${file.name}:${i + 1} — JSON.parse without try/catch`, | |
| file: file.name, line: i + 1, | |
| remediation: 'Wrap JSON.parse in try/catch' | |
| }); | |
| } | |
| } | |
| if (/fs\.readFileSync/.test(line)) { | |
| findings.push({ | |
| id: `PERF-${String(++idCounter).padStart(3, '0')}`, | |
| severity: 'low', | |
| category: 'sync_io', | |
| description: `${file.name}:${i + 1} — Synchronous file read`, | |
| file: file.name, line: i + 1, | |
| remediation: 'Consider async file operations' | |
| }); | |
| } | |
| if (line.length > 200) { | |
| findings.push({ | |
| id: `PERF-${String(++idCounter).padStart(3, '0')}`, | |
| severity: 'info', | |
| category: 'long_line', | |
| description: `${file.name}:${i + 1} — Line exceeds 200 characters (${line.length})`, | |
| file: file.name, line: i + 1, | |
| remediation: 'Consider breaking long lines' | |
| }); | |
| } | |
| } | |
| } | |
| const high = findings.filter(f => f.severity === 'high').length; | |
| const medium = findings.filter(f => f.severity === 'medium').length; | |
| const low = findings.filter(f => f.severity === 'low').length; | |
| return { | |
| twin: 'performance', | |
| verdict: high > 0 ? 'fail' : medium > 0 ? 'warn' : 'pass', | |
| findings, | |
| passed: sourceFiles.length - (high > 0 ? 1 : 0), | |
| failed: high, | |
| warnings: medium + low, | |
| duration_ms: 0 | |
| }; | |
| } | |