diff options
Diffstat (limited to 'src/bytes/buffer.go')
| -rw-r--r-- | src/bytes/buffer.go | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/src/bytes/buffer.go b/src/bytes/buffer.go index 14c5bc38d6..087cc0e427 100644 --- a/src/bytes/buffer.go +++ b/src/bytes/buffer.go @@ -12,13 +12,15 @@ import ( "unicode/utf8" ) +// smallBufferSize is an initial allocation minimal capacity. +const smallBufferSize = 64 + // A Buffer is a variable-sized buffer of bytes with Read and Write methods. // The zero value for Buffer is an empty buffer ready to use. type Buffer struct { - buf []byte // contents are the bytes buf[off : len(buf)] - off int // read at &buf[off], write at &buf[len(buf)] - bootstrap [64]byte // memory to hold first slice; helps small buffers avoid allocation. - lastRead readOp // last read operation, so that Unread* can work correctly. + buf []byte // contents are the bytes buf[off : len(buf)] + off int // read at &buf[off], write at &buf[len(buf)] + lastRead readOp // last read operation, so that Unread* can work correctly. // FIXME: it would be advisable to align Buffer to cachelines to avoid false // sharing. @@ -125,9 +127,8 @@ func (b *Buffer) grow(n int) int { if i, ok := b.tryGrowByReslice(n); ok { return i } - // Check if we can make use of bootstrap array. - if b.buf == nil && n <= len(b.bootstrap) { - b.buf = b.bootstrap[:n] + if b.buf == nil && n <= smallBufferSize { + b.buf = make([]byte, n, smallBufferSize) return 0 } c := cap(b.buf) |