Text_Diff_Renderer::render( Text_Diff $diff ): string

77    function render($diff)78    {79        $xi = $yi = 1;80        $block = false;81        $context = array();82 83        $nlead = $this->_leading_context_lines;84        $ntrail = $this->_trailing_context_lines;85 86        $output = $this->_startDiff();87 88        $diffs = $diff->getDiff();89        foreach ($diffs as $i => $edit) {90            /* If these are unchanged (copied) lines, and we want to keep91             * leading or trailing context lines, extract them from the copy92             * block. */93            if (is_a($edit, 'Text_Diff_Op_copy')) {94                /* Do we have any diff blocks yet? */95                if (is_array($block)) {96                    /* How many lines to keep as context from the copy97                     * block. */98                    $keep = $i == count($diffs) - 1 ? $ntrail : $nlead + $ntrail;99                    if (count($edit->orig) <= $keep) {100                        /* We have less lines in the block than we want for101                         * context => keep the whole block. */102                        $block[] = $edit;103                    } else {104                        if ($ntrail) {105                            /* Create a new block with as many lines as we need106                             * for the trailing context. */107                            $context = array_slice($edit->orig, 0, $ntrail);108                            $block[] = new Text_Diff_Op_copy($context);109                        }110                        /* @todo */111                        $output .= $this->_block($x0, $ntrail + $xi - $x0,112                                                 $y0, $ntrail + $yi - $y0,113                                                 $block);114                        $block = false;115                    }116                }117                /* Keep the copy block as the context for the next block. */118                $context = $edit->orig;119            } else {120                /* Don't we have any diff blocks yet? */121                if (!is_array($block)) {122                    /* Extract context lines from the preceding copy block. */123                    $context = array_slice($context, count($context) - $nlead);124                    $x0 = $xi - count($context);125                    $y0 = $yi - count($context);126                    $block = array();127                    if ($context) {128                        $block[] = new Text_Diff_Op_copy($context);129                    }130                }131                $block[] = $edit;132            }133 134            if ($edit->orig) {135                $xi += count($edit->orig);136            }137            if ($edit->final) {138                $yi += count($edit->final);139            }140        }141 142        if (is_array($block)) {143            $output .= $this->_block($x0, $xi - $x0,144                                     $y0, $yi - $y0,145                                     $block);146        }147 148        return $output . $this->_endDiff();149    }
When	Instructions	Calls it makes
`!is_array($block)`	21–22	`->_startDiff(), ->getDiff(), ->_endDiff()`
`is_array($block)`	31–32	`->_startDiff(), ->getDiff(), ->_block(), ->_endDiff()`
PHP	Compiled	Executed	Branches	Notes
8.6-dev	119	21–32	12
8.5	119	21–32	12
8.4	119	21–32	12
8.3	119	21–32	12
8.2	119	21–32	12
8.1	119	21–32	12	1 fewer instruction than PHP 7.4
7.4	120	21–32	12