()
| 238 | |
| 239 | // Helper function to process a batch |
| 240 | async function processBatch() { |
| 241 | // Update stats |
| 242 | stats.rowsProcessed += currentBatch.length; |
| 243 | |
| 244 | // Calculate processing speed and estimated time |
| 245 | updateProcessingStats(stats); |
| 246 | |
| 247 | // Call custom chunk handler if provided |
| 248 | if (onChunkParsed) { |
| 249 | await onChunkParsed(currentBatch, headers, stats.chunksProcessed === 1); |
| 250 | } |
| 251 | |
| 252 | // Clear the batch |
| 253 | const processedBatch = currentBatch; |
| 254 | currentBatch = []; |
| 255 | |
| 256 | // Yield control to browser if enough time has passed |
| 257 | const currentTime = Date.now(); |
| 258 | if (currentTime - lastYieldTime > 16) { // ~60fps |
| 259 | await new Promise(resolve => { |
| 260 | if (typeof requestAnimationFrame !== 'undefined') { |
| 261 | requestAnimationFrame(resolve); |
| 262 | } else { |
| 263 | setTimeout(resolve, 0); |
| 264 | } |
| 265 | }); |
| 266 | lastYieldTime = currentTime; |
| 267 | } |
| 268 | } |
| 269 | |
| 270 | } catch (err) { |
| 271 | const errorMessage = err instanceof Error ? err.message : 'Unknown error parsing CSV'; |
no test coverage detected