commit 5524b108ff5ebdfb113d77a313fa881f873480c1
parent a4c17689cd66e1ef35c667914765cb24c9a4b305
Author: Jared Tobin <jared@jtobin.io>
Date: Tue, 23 Dec 2025 06:34:57 -0330
meta: remove comparison benchmarks
These are out of date, and I haven't compiled the SHA package with llvm,
so they're no longer accurate.
Diffstat:
| M | README.md | | | 80 | ++----------------------------------------------------------------------------- |
1 file changed, 2 insertions(+), 78 deletions(-)
diff --git a/README.md b/README.md
@@ -55,8 +55,7 @@ Haddocks (API documentation, etc.) are hosted at
## Performance
-The aim is best-in-class performance for pure, highly-auditable Haskell
-code. You should compile with the 'llvm' flag for maximum performance.
+The aim is best-in-class performance for pure Haskell code.
Current benchmark figures on an M4 Silicon MacBook Air look like (use
`cabal bench` to run the benchmark suite):
@@ -75,82 +74,7 @@ Current benchmark figures on an M4 Silicon MacBook Air look like (use
std dev 8.491 ns (4.940 ns .. 15.65 ns)
```
-Compare this to Hackage's venerable SHA package:
-
-```
- benchmarking ppad-sha256/SHA256 (32B input)/SHA.sha256
- time 1.415 μs (1.414 μs .. 1.415 μs)
- 1.000 R² (1.000 R² .. 1.000 R²)
- mean 1.415 μs (1.415 μs .. 1.415 μs)
- std dev 1.334 ns (1.158 ns .. 1.576 ns)
-
- benchmarking ppad-sha256/HMAC-SHA256 (32B input)/SHA.hmacSha256
- time 5.157 μs (5.156 μs .. 5.158 μs)
- 1.000 R² (1.000 R² .. 1.000 R²)
- mean 5.158 μs (5.157 μs .. 5.159 μs)
- std dev 2.947 ns (2.413 ns .. 3.606 ns)
-```
-
-Or the relevant SHA-256-based functions from a library with similar
-aims, [noble-hashes][noble]:
-
-```
-SHA256 32B x 420,875 ops/sec @ 2μs/op ± 1.33% (min: 1μs, max: 3ms)
-HMAC-SHA256 32B x 97,304 ops/sec @ 10μs/op
-```
-
-When reading a 1GB input from disk and testing it with `hash_lazy`, we
-get statistics like the following:
-
-```
- 2,310,899,616 bytes allocated in the heap
- 93,800 bytes copied during GC
- 78,912 bytes maximum residency (2 sample(s))
- 35,776 bytes maximum slop
- 10 MiB total memory in use (0 MiB lost due to fragmentation)
-
- Tot time (elapsed) Avg pause Max pause
- Gen 0 295 colls, 0 par 0.007s 0.008s 0.0000s 0.0001s
- Gen 1 2 colls, 0 par 0.000s 0.001s 0.0004s 0.0004s
-
- INIT time 0.003s ( 0.003s elapsed)
- MUT time 22.205s ( 22.260s elapsed)
- GC time 0.007s ( 0.009s elapsed)
- EXIT time 0.000s ( 0.001s elapsed)
- Total time 22.216s ( 22.273s elapsed)
-
- %GC time 0.0% (0.0% elapsed)
-
- Alloc rate 104,073,382 bytes per MUT second
-
- Productivity 100.0% of total user, 99.9% of total elapsed
-```
-
-SHA.sha256 gets more like:
-
-```
- 74,403,596,936 bytes allocated in the heap
- 12,971,992 bytes copied during GC
- 79,176 bytes maximum residency (2 sample(s))
- 35,512 bytes maximum slop
- 6 MiB total memory in use (0 MiB lost due to fragmentation)
-
- Tot time (elapsed) Avg pause Max pause
- Gen 0 17883 colls, 0 par 0.103s 0.148s 0.0000s 0.0001s
- Gen 1 2 colls, 0 par 0.000s 0.000s 0.0002s 0.0003s
-
- INIT time 0.006s ( 0.006s elapsed)
- MUT time 32.367s ( 32.408s elapsed)
- GC time 0.104s ( 0.149s elapsed)
- EXIT time 0.000s ( 0.001s elapsed)
- Total time 32.477s ( 32.563s elapsed)
-
- %GC time 0.0% (0.0% elapsed)
-
- Alloc rate 2,298,740,250 bytes per MUT second
-
- Productivity 99.7% of total user, 99.5% of total elapsed
-```
+You should compile with the 'llvm' flag for maximum performance.
## Security
