export function fastSplice ( array , startIndex , removeCount ) { let len = array . length ; let removeLen = 0 ; if ( startIndex >= len || removeCount === 0 ) { return ; } removeCount = startIndex + removeCount > len ? len - startIndex : removeCount ; removeLen = len - removeCount ; for ( let i = startIndex ; i < len ; i += 1 ) { array [ i ] = array [ i + removeCount ] ; } array . length = removeLen ; }