- We purchased this laptop and tried to find SSD performance.
- Treat this as our review of Macbook 2019 SSD performance in our environment.
- Used direct IO and/or sync to avoid cache.
- Picked the best possible peak numbers and corresponding latencies. These are not numbers from sustained run.
- 100% write performance is higher than 100% read (except 1M block size). This is run with ”sync” which does not seem to impact write performance much. In spite of using direct IO & sync, we think write performance is still riding on filesystem cache. Added sustained 1m sequential write numbers (see new chart added below). Unfortunately, we do not have block level access to the drive, which will give real hardware performance. You can see sustained write performance drops quite a bit after writing some amount of data, even with filesystem on top.
- Doing benchmark at block level will give the real hardware performance. Unfortunately, we do not have choice to use this drive at block level.
- Whether an application can fully utilize the bandwidth (The advertised “up to” number) really depends on which block size, read/write ratio, sequential or random access workload, that application is using.
- We can help identify which storage system is optimal for your application in terms of performance.
- If you are interested, use with caution as performance numbers could vary depending on multiple factors. We are not liable for any loss or damages caused by using this data
