alamb commented on code in PR #14211:
URL: https://github.com/apache/datafusion/pull/14211#discussion_r1927810712
##########
datafusion/functions/Cargo.toml:
##########
@@ -82,9 +82,11 @@ hex = { version = "0.4", optional = true }
itertools = { workspace = true }
log = { workspace = true }
md-5 = { version = "^0.10.0", optional = true }
+memchr = { version = "2.7.4", optional = true }
rand = { workspace = true }
regex = { workspace = true, optional = true }
sha2 = { version = "^0.10.1", optional = true }
+stringzilla = { version = "3", optional = true }
Review Comment:
I also think @samuelcolvin 's experience was that the different
implemnetations were faster/slower on some architectures / cahce sizes. So
unless we have significant evidence this is faster for most/all platforms I
would be hesitant to include it
##########
datafusion/functions/benches/contains.rs:
##########
@@ -0,0 +1,162 @@
+// Licensed to the Apache Software Foundation (ASF) under one
Review Comment:
Would it be possible to break this benchmark into its own PR?
This is mostly a selfish ask as I have comparison scripts for performance
that compare performance against main, and they only work if the benchmark is
on main as well
##########
.github/workflows/rust.yml:
##########
@@ -286,11 +286,17 @@ jobs:
uses: ./.github/actions/setup-builder
with:
rust-version: stable
+ - name: Install emscripten dependency
Review Comment:
what is this needed for?
##########
datafusion/functions/Cargo.toml:
##########
@@ -82,9 +82,11 @@ hex = { version = "0.4", optional = true }
itertools = { workspace = true }
log = { workspace = true }
md-5 = { version = "^0.10.0", optional = true }
+memchr = { version = "2.7.4", optional = true }
rand = { workspace = true }
regex = { workspace = true, optional = true }
sha2 = { version = "^0.10.1", optional = true }
+stringzilla = { version = "3", optional = true }
Review Comment:
My biggest concern is these new library dependencies as our dependency. I
haven't looked at it in detail but I think we need to evaluate how likely it is
for it to be maintained, etc
https://github.com/ashvardanian/stringzilla looks pretty solild though after
a quick look
Also, I think we should be planning to upstream as many of the low level
operations (like string contains) as possible to arrow-rs (so we can have a
larger user base to help improve them)
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