[feat] improve performance while filtering

Author: robinovitch61

internal/model/page_log.go

@@ -36,16 +36,28 @@ type PageLog struct {
 }
 
 func (l PageLog) Render() linebuffer.LineBufferer {
+	return l.render(true)
+}
+
+func (l PageLog) RenderWithoutStyle() linebuffer.LineBufferer {
+	return l.render(false)
+}
+
+func (l PageLog) render(includeStyle bool) linebuffer.LineBufferer {
 	ts := ""
 	if l.CurrentTimestamp != "" {
-		ts = l.Styles.Green.Render(l.CurrentTimestamp)
+		if includeStyle {
+			ts = l.Styles.Green.Render(l.CurrentTimestamp)
+		} else {
+			ts = l.CurrentTimestamp
+		}
 	}
 	label := ""
 	if l.CurrentName.ContainerName != "" {
 		if ts != "" {
 			label += " "
 		}
-		label += l.RenderName(*l.CurrentName, true)
+		label += l.RenderName(*l.CurrentName, includeStyle)
 	}
 
 	prefix := ts + label

internal/page/logs.go

@@ -48,7 +48,7 @@ func NewLogsPage(
 			Height:               height,
 			AllRows:              lc.GetOrderedLogs(),
 			MatchesFilter: func(log model.PageLog, filter filter.Model) bool {
-				return log.Render().Matches(filter)
+				return log.RenderWithoutStyle().Matches(filter)
 			},
 			ViewWhenEmpty: "No logs yet",
 			Styles:        styles,

internal/viewport/linebuffer/linebuffer.go

@@ -17,6 +17,7 @@ type LineBuffer struct {
 	lineNoAnsiRuneWidths []uint8    // terminal cell widths
 	ansiCodeIndexes      [][]uint32 // slice of startByte, endByte indexes of ansi codes
 	numNoAnsiRunes       int        // number of runes in lineNoAnsi
+	totalWidth           int        // total width in terminal cells
 
 	sparsity                        int      // interval for which to store cumulative cell width
 	sparseRuneIdxToNoAnsiByteOffset []uint32 // rune idx to byte offset of lineNoAnsi, stored every sparsity runes
@@ -86,6 +87,9 @@ func New(line string) LineBuffer {
 			lb.sparseRuneIdxToNoAnsiByteOffset[runeIdx/lb.sparsity] = currentOffset
 			lb.sparseLineNoAnsiCumRuneWidths[runeIdx/lb.sparsity] = cumWidth
 		}
+		if runeIdx == numRunes-1 {
+			lb.totalWidth = int(cumWidth)
+		}
 		currentOffset += uint32(runeNumBytes)
 		runeIdx++
 		byteOffset += runeNumBytes
@@ -99,8 +103,7 @@ func (l LineBuffer) Width() int {
 	if len(l.line) == 0 {
 		return 0
 	}
-	lastRuneIdx := len(l.lineNoAnsiRuneWidths) - 1
-	return int(l.getCumulativeWidthAtRuneIdx(lastRuneIdx))
+	return l.totalWidth
 }
 
 func (l LineBuffer) Content() string {