perf(replacer): optimize memory allocation for file placeholders (#7773)

Co-authored-by: jalikajalika5 <105954036+jalikajalika5@users.noreply.github.com>

Muhammad Syafri, S.Kom committed May 27, 2026 at 21:20 UTC 4d60d936edce2ab49cb36c47d0d1bdc0029a0ed2

1 file changed +4 -8

replacer.go

+4 -8

@@ -427,14 +427,10 @@ func readFileIntoBuffer(filename string, size int) ([]byte, error) {

427 }

428 defer file.Close()

429

430 - buffer := make([]byte, size)

431 - n, err := file.Read(buffer)

432 - if err != nil && err != io.EOF {

433 - return nil, err

434 - }

435 -

436 - // slice the buffer to the actual size

437 - return buffer[:n], nil

430 + // io.LimitReader ensures we never read more than 'size' bytes.

431 + // io.ReadAll starts with a small buffer and grows it as needed,

432 + // preventing a massive 1MB allocation for small files.

433 + return io.ReadAll(io.LimitReader(file, int64(size)))

434 }

435

436 // ReplacementFunc is a function that is called when a