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storage/driver: decrease memory allocation done during testsuite

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Signed-off-by: Stephen J Day <stephen.day@docker.com>
This commit is contained in:
Stephen J Day 2015-12-07 18:54:22 -08:00
parent 7a584f21b8
commit 9dc3c6df0e
1 changed files with 18 additions and 11 deletions
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29
registry/storage/driver/testsuites/testsuites.go
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@ -1135,12 +1135,19 @@ func randomFilename(length int64) string {
return string(b)
}
func randomContents(length int64) []byte {
b := make([]byte, length)
for i := range b {
b[i] = byte(rand.Intn(2 << 8))
// randomBytes pre-allocates all of the memory sizes needed for the test. If
// anything panics while accessing randomBytes, just make this number bigger.
var randomBytes = make([]byte, 96<<20)
func init() {
// increase the random bytes to the required maximum
for i := range randomBytes {
randomBytes[i] = byte(rand.Intn(2 << 8))
}
return b
}
func randomContents(length int64) []byte {
return randomBytes[:length]
}
type randReader struct {
@ -1151,14 +1158,14 @@ type randReader struct {
func (rr *randReader) Read(p []byte) (n int, err error) {
rr.m.Lock()
defer rr.m.Unlock()
for i := 0; i < len(p) && rr.r > 0; i++ {
p[i] = byte(rand.Intn(255))
n++
rr.r--
}
if rr.r == 0 {
n = copy(p, randomContents(int64(len(p))))
rr.r -= int64(n)
if rr.r <= 0 {
err = io.EOF
}
return
}