Create and use a strings.Builder pool

This will probably make no big difference, but let's give it a try

pkgs/builderpool/builderPool.go

@@ -0,0 +1,23 @@
+package builderpool
+
+import (
+	"strings"
+	"sync"
+)
+
+var builderPool = sync.Pool{
+	New: func() any {
+		return new(strings.Builder)
+	},
+}
+
+func Get() *strings.Builder {
+	return builderPool.Get().(*strings.Builder)
+}
+
+func Put(bufs ...*strings.Builder) {
+	for _, buf := range bufs {
+		buf.Reset()
+		builderPool.Put(buf)
+	}
+}

pkgs/highlighting/highlighting.go

@@ -2,13 +2,13 @@ package highlighting
 
 import (
 	"io"
-	"strings"
 
 	"github.com/yuin/goldmark"
 	"github.com/yuin/goldmark/ast"
 	"github.com/yuin/goldmark/renderer"
 	"github.com/yuin/goldmark/renderer/html"
 	"github.com/yuin/goldmark/util"
+	"go.goblog.app/app/pkgs/builderpool"
 
 	"github.com/alecthomas/chroma/v2"
 	chromahtml "github.com/alecthomas/chroma/v2/formatters/html"
@@ -60,7 +60,8 @@ func (r *htmlRenderer) renderFencedCodeBlock(w util.BufWriter, source []byte, no
 	n := node.(*ast.FencedCodeBlock)
 
 	// Read code block content.
-	var buf strings.Builder
+	buf := builderpool.Get()
+	defer builderpool.Put(buf)
 	for _, line := range n.Lines().Sliced(0, n.Lines().Len()) {
 		buf.Write(line.Value(source))
 	}

postsDb.go

@@ -12,6 +12,7 @@ import (
 	"github.com/araddon/dateparse"
 	"github.com/samber/lo"
 	"go.goblog.app/app/pkgs/bufferpool"
+	"go.goblog.app/app/pkgs/builderpool"
 )
 
 func (a *goBlog) checkPost(p *post, new bool) (err error) {
@@ -206,7 +207,8 @@ func (db *database) savePost(p *post, o *postCreationOptions) error {
 	db.pcm.Lock()
 	defer db.pcm.Unlock()
 	// Build SQL
-	var sqlBuilder strings.Builder
+	sqlBuilder := builderpool.Get()
+	defer builderpool.Put(sqlBuilder)
 	var sqlArgs = []any{dbNoCache}
 	// Start transaction
 	sqlBuilder.WriteString("begin;")
@@ -335,7 +337,8 @@ func (db *database) replacePostParam(path, param string, values []string) error
 	db.pcm.Lock()
 	defer db.pcm.Unlock()
 	// Build SQL
-	var sqlBuilder strings.Builder
+	sqlBuilder := builderpool.Get()
+	defer builderpool.Put(sqlBuilder)
 	var sqlArgs = []any{dbNoCache}
 	// Start transaction
 	sqlBuilder.WriteString("begin;")
@@ -385,7 +388,8 @@ type postsRequestConfig struct {
 }
 
 func buildPostsQuery(c *postsRequestConfig, selection string) (query string, args []any) {
-	var queryBuilder strings.Builder
+	queryBuilder := builderpool.Get()
+	defer builderpool.Put(queryBuilder)
 	// Selection
 	queryBuilder.WriteString("select ")
 	queryBuilder.WriteString(selection)
@@ -519,7 +523,8 @@ func (d *database) loadPostParameters(posts []*post, parameters ...string) (err
 	}
 	// Build query
 	sqlArgs := make([]any, 0)
-	var queryBuilder strings.Builder
+	queryBuilder := builderpool.Get()
+	defer builderpool.Put(queryBuilder)
 	queryBuilder.WriteString("select path, parameter, value from post_parameters where")
 	// Paths
 	queryBuilder.WriteString(" path in (")
@@ -691,7 +696,8 @@ group by name;
 
 func (db *database) usesOfMediaFile(names ...string) (counts []int, err error) {
 	sqlArgs := []any{dbNoCache}
-	var nameValues strings.Builder
+	nameValues := builderpool.Get()
+	defer builderpool.Put(nameValues)
 	for i, n := range names {
 		if i > 0 {
 			nameValues.WriteString(", ")

reactions.go

@@ -5,10 +5,10 @@ import (
 	"errors"
 	"io"
 	"net/http"
-	"strings"
 
 	"github.com/dgraph-io/ristretto"
 	"github.com/samber/lo"
+	"go.goblog.app/app/pkgs/builderpool"
 	"go.goblog.app/app/pkgs/contenttype"
 )
 
@@ -107,7 +107,8 @@ func (a *goBlog) getReactionsFromDatabase(path string) (map[string]int, error) {
 	// Get reactions
 	res, err, _ := a.reactionsSfg.Do(path, func() (any, error) {
 		// Build query
-		var sqlBuf strings.Builder
+		sqlBuf := builderpool.Get()
+		defer builderpool.Put(sqlBuf)
 		sqlArgs := []any{}
 		sqlBuf.WriteString("select reaction, count from reactions where path=? and reaction in (")
 		sqlArgs = append(sqlArgs, path)

telegram.go

@@ -5,9 +5,9 @@ import (
 	"log"
 	"net/url"
 	"strconv"
-	"strings"
 
 	tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api/v5"
+	"go.goblog.app/app/pkgs/builderpool"
 )
 
 func (a *goBlog) initTelegram() {
@@ -135,7 +135,8 @@ func (tg *configTelegram) generateHTML(title, fullURL, shortURL string) (html st
 	if !tg.enabled() {
 		return ""
 	}
-	var message strings.Builder
+	message := builderpool.Get()
+	defer builderpool.Put(message)
 	if title != "" {
 		message.WriteString(tgbotapi.EscapeText(tgbotapi.ModeHTML, title))
 		message.WriteString("\n\n")

uiComponents.go

@@ -6,6 +6,7 @@ import (
 	"time"
 
 	"github.com/samber/lo"
+	"go.goblog.app/app/pkgs/builderpool"
 	"go.goblog.app/app/pkgs/htmlbuilder"
 )
 
@@ -64,7 +65,8 @@ func (a *goBlog) renderSummary(hb *htmlbuilder.HtmlBuilder, bc *configBlog, p *p
 	}
 	// Show link to full post
 	hb.WriteElementOpen("p")
-	var prefix strings.Builder
+	prefix := builderpool.Get()
+	defer builderpool.Put(prefix)
 	if len(photos) > 0 {
 		// Contains photos
 		prefix.WriteString("🖼️")

webmention.go

@@ -8,6 +8,7 @@ import (
 	"strings"
 	"time"
 
+	"go.goblog.app/app/pkgs/builderpool"
 	"go.goblog.app/app/pkgs/contenttype"
 )
 
@@ -230,7 +231,8 @@ type webmentionsRequestConfig struct {
 }
 
 func buildWebmentionsQuery(config *webmentionsRequestConfig) (query string, args []any) {
-	var queryBuilder strings.Builder
+	queryBuilder := builderpool.Get()
+	defer builderpool.Put(queryBuilder)
 	queryBuilder.WriteString("select id, source, target, url, created, title, content, author, status from webmentions ")
 	if config != nil {
 		queryBuilder.WriteString("where 1")