Demogorgon314 commented on pull request #13246:
URL: https://github.com/apache/pulsar/pull/13246#issuecomment-991868100
Here is a simple benchmark about arm64 instructions optimized and software
implementation, the performance is improved by **6** times.
```cpp
TEST(ClientTest, testSwHwArmChecksumBench) {
std::string data = "This is a simple benchmark for CRC32C hardware and
software implementation.";
int times = 100000;
clock_t startTime,endTime;
uint32_t hwArmChecksum;
startTime = clock();
for(int i = 0; i < times; i++) {
hwArmChecksum = crc32cHwArm(0, (char *)data.c_str(), data.length());
}
endTime = clock();
LOG_INFO("Crc32cHwArm run time is: " << endTime - startTime << " ms");
uint32_t swChecksum;
startTime = clock();
for(int i = 0; i < times; i++) {
swChecksum = crc32cSw(0, (char *)data.c_str(), data.length());
}
endTime = clock();
LOG_INFO("Crc32cSw run time is: " << endTime - startTime << " ms");
}
```
```text
2021-12-12 17:58:36.299 INFO [0x10594c580] ClientTest:104 | Crc32cHwArm run
time is: 563 ms
2021-12-12 17:58:36.303 INFO [0x10594c580] ClientTest:111 | Crc32cSw run
time is: 3840 ms
```
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