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S3BinaryCacheStore:: Eliminate a string copy while uploading

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This cuts hydra-queue-runner's peak memory usage by about a third.
This commit is contained in:
Eelco Dolstra 2016-11-16 16:21:30 +01:00
parent 10ae8fabf1
commit 4be4f6de56
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4 changed files with 17 additions and 3 deletions
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src/libstore/s3-binary-cache-store.cc
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@ -145,7 +145,7 @@ struct S3BinaryCacheStoreImpl : public S3BinaryCacheStore
.WithBucket(bucketName)
.WithKey(path);
auto stream = std::make_shared<std::stringstream>(data);
auto stream = std::make_shared<istringstream_nocopy>(data);
request.SetBody(stream);