debian-packages/vibe-core
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Allow the buffer to grow for PipeMode.concurrent.

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Reduces overhead for fast streams by increasing the buffer size up to 4MB, as long as the latency stays below 100ms.
This commit is contained in:
Sönke Ludwig 2021-01-12 14:40:36 +01:00
parent 0b6aa0d24c
commit 3e45456bf3
1 changed files with 9 additions and 2 deletions
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11
source/vibe/core/stream.d
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@ -77,7 +77,7 @@ ulong pipe(InputStream, OutputStream)(InputStream source, OutputStream sink,
case PipeMode.concurrent:
{
enum bufcount = 4;
enum bufsize = 64*1024;
enum bufsize = 4*1024*1024;
static struct ConcurrentPipeState {
InputStream source;
@ -94,6 +94,9 @@ ulong pipe(InputStream, OutputStream)(InputStream source, OutputStream sink,
void readLoop()
{
// gradually increased depending on read speed
size_t rbsize = 64*1024;
while (true) {
ulong remaining = nbytes == ulong.max ? source.leastSize : nbytes;
if (remaining == 0) break;
@ -101,9 +104,13 @@ ulong pipe(InputStream, OutputStream)(InputStream source, OutputStream sink,
while (read_idx >= write_idx + buffers.length)
evt.wait();
size_t chunk = min(remaining, bufsize);
size_t chunk = min(remaining, rbsize);
auto bi = read_idx % bufcount;
auto tm = MonoTime.currTime;
source.read(buffers[bi][0 .. chunk]);
if (rbsize < bufsize && MonoTime.currTime - tm < 100.msecs)
rbsize *= 2;
if (nbytes != ulong.max) nbytes -= chunk;
bytesWritten += chunk;
bufferFill[bi] = chunk;