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cat: Use a 32 KB I/O buffer here to improve "cat a > b" scenario
This is roughly twice as fast as the old 4 KB buffer size. We still don't go nearly as fast as "cp", since we don't ftruncate() up front like "cp" does.
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@ -24,7 +24,7 @@ int main(int argc, char** argv)
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}
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for (auto& fd : fds) {
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for (;;) {
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char buf[4096];
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char buf[32768];
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ssize_t nread = read(fd, buf, sizeof(buf));
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if (nread == 0)
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break;
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