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Your loop yields every 500 items. It still freezes. Here's why (and a fix)

Every JavaScript developer eventually writes this loop: for ( const [ index , row ] of rows . entries ()) { processRow ( row ); if ( index % 500 === 0 ) await new Promise ( resolve => setImmediate (…

  • Traditional loop yields control every 500 items to prevent UI freeze
  • Heavy items in dataset cause loop to freeze despite technique
  • Time-sliced library yields control based on processing time, not item count

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