diff options
Diffstat (limited to 'vendor/github.com/klauspost/compress/flate/fast_encoder.go')
| -rw-r--r-- | vendor/github.com/klauspost/compress/flate/fast_encoder.go | 24 |
1 files changed, 11 insertions, 13 deletions
diff --git a/vendor/github.com/klauspost/compress/flate/fast_encoder.go b/vendor/github.com/klauspost/compress/flate/fast_encoder.go index b0a470f92..3d2fdcd77 100644 --- a/vendor/github.com/klauspost/compress/flate/fast_encoder.go +++ b/vendor/github.com/klauspost/compress/flate/fast_encoder.go @@ -42,10 +42,10 @@ const ( baseMatchLength = 3 // The smallest match length per the RFC section 3.2.5 maxMatchOffset = 1 << 15 // The largest match offset - bTableBits = 18 // Bits used in the big tables - bTableSize = 1 << bTableBits // Size of the table - allocHistory = maxMatchOffset * 10 // Size to preallocate for history. - bufferReset = (1 << 31) - allocHistory - maxStoreBlockSize // Reset the buffer offset when reaching this. + bTableBits = 18 // Bits used in the big tables + bTableSize = 1 << bTableBits // Size of the table + allocHistory = maxStoreBlockSize * 20 // Size to preallocate for history. + bufferReset = (1 << 31) - allocHistory - maxStoreBlockSize - 1 // Reset the buffer offset when reaching this. ) const ( @@ -210,16 +210,14 @@ func (e *fastGen) matchlenLong(s, t int32, src []byte) int32 { // Reset the encoding table. func (e *fastGen) Reset() { - if cap(e.hist) < int(maxMatchOffset*8) { - l := maxMatchOffset * 8 - // Make it at least 1MB. - if l < 1<<20 { - l = 1 << 20 - } - e.hist = make([]byte, 0, l) + if cap(e.hist) < allocHistory { + e.hist = make([]byte, 0, allocHistory) + } + // We offset current position so everything will be out of reach. + // If we are above the buffer reset it will be cleared anyway since len(hist) == 0. + if e.cur <= bufferReset { + e.cur += maxMatchOffset + int32(len(e.hist)) } - // We offset current position so everything will be out of reach - e.cur += maxMatchOffset + int32(len(e.hist)) e.hist = e.hist[:0] } |