[performance] bump codeberg.org/gruf/go-kv to v2 (#4341)

updates our codeberg.org/gruf/go-kv log key-value formatting library to latest version, which comes with some maaaaaaajor speed boosts in the form of:
- very minimal reflect.Value{} usage
- caching prepared formatting functions per type

~~still a work-in-progress until i make a release tag on the go-kv repository, which itself is waiting on published benchmark results in the README and finishing writing some code comments~~

benchmarks so far show this to be ~3x faster than the "fmt" stdlib package on average, when run across a wide variety (106 different types) of test cases, while still creating more visually friendly log output and actually recursing down nested struct ptrs

Reviewed-on: https://codeberg.org/superseriousbusiness/gotosocial/pulls/4341
Co-authored-by: kim <grufwub@gmail.com>
Co-committed-by: kim <grufwub@gmail.com>

1 files changed, 63 insertions, 0 deletions

diff --git a/vendor/codeberg.org/gruf/go-kv/v2/field_fmt.go b/vendor/codeberg.org/gruf/go-kv/v2/field_fmt.go
new file mode 100644
index 000000000..5d6e77f4b
--- /dev/null
+++ b/vendor/codeberg.org/gruf/go-kv/v2/field_fmt.go
@@ -0,0 +1,63 @@
+//go:build !kvformat
+// +build !kvformat
+
+package kv
+
+import (
+	"fmt"
+	"sync"
+
+	"codeberg.org/gruf/go-byteutil"
+)
+
+// bufPool is a memory pool of byte buffers.
+var bufPool = sync.Pool{
+	New: func() interface{} {
+		return &byteutil.Buffer{B: make([]byte, 0, 512)}
+	},
+}
+
+// AppendFormat will append formatted format of Field to 'buf'. See .String() for details.
+func (f Field) AppendFormat(buf *byteutil.Buffer, vbose bool) {
+	var fmtstr string
+	if vbose /* verbose */ {
+		fmtstr = `%#v`
+	} else /* regular */ {
+		fmtstr = `%+v`
+	}
+	AppendQuoteString(buf, f.K)
+	buf.WriteByte('=')
+	appendValuef(buf, fmtstr, f.V)
+}
+
+// Value returns the formatted value string of this Field.
+func (f Field) Value(vbose bool) string {
+	var fmtstr string
+	if vbose /* verbose */ {
+		fmtstr = `%#v`
+	} else /* regular */ {
+		fmtstr = `%+v`
+	}
+	buf := byteutil.Buffer{B: make([]byte, 0, bufsize/2)}
+	appendValuef(&buf, fmtstr, f.V)
+	return buf.String()
+}
+
+// appendValuef appends a quoted value string (formatted by fmt.Appendf) to 'buf'.
+func appendValuef(buf *byteutil.Buffer, format string, args ...interface{}) {
+	// Write format string to a byte buffer
+	fmtbuf := bufPool.Get().(*byteutil.Buffer)
+	fmtbuf.B = fmt.Appendf(fmtbuf.B, format, args...)
+
+	// Append quoted value to dst buffer
+	AppendQuoteValue(buf, fmtbuf.String())
+
+	// Drop overly large capacity buffers
+	if fmtbuf.Cap() > int(^uint16(0)) {
+		return
+	}
+
+	// Replace buffer in pool
+	fmtbuf.Reset()
+	bufPool.Put(fmtbuf)
+}