update deps and add low memory feature

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "libflatterer"
-version = "0.19.9"
+version = "0.19.10"
 authors = ["David Raznick <[email protected]>"]
 edition = "2021"
 description = "Lib to make JSON flatterer"
@@ -14,18 +14,18 @@ homepage = "https://github.com/kindly/libflatterer"
 yajlish = { version = "0.4.0" }
 #yajlish = { path = "../yajlish" }
 serde_json = { version = "1", features = ["preserve_order"] }
-itertools = "0.10"
+itertools = "0.12.0"
 csv = "1"
 serde = {version = "1", features = ["derive"] }
 smallvec="1.6.1"
 regex="1"
 slug="0.1"
 smartstring={version = "1.0.0", features = ["serde"] }
 snafu = {version = "0.7.0"}
-indexmap = {version = "1", features = ["serde"] }
+indexmap = {version = "2.1.0", features = ["serde"] }
 log = "0.4"
 lazy_static = "1"
-typed-builder = "0.10.0"
+typed-builder = "0.18.0"
 num_cpus = "1.13.1"
 flate2 = "1.0.24"
 csvs_convert = "0.8.8"
@@ -39,7 +39,7 @@ jsonpath-rust = "0.3.0"
 
 [target.'cfg(not(target_family = "wasm"))'.dependencies]
 jsonref= "0.4"
-object_store = { version = "0.6.1", features = ["aws", "http"]}
+object_store = { version = "0.8.0", features = ["aws", "http"]}
 #object_store = { git = "https://github.com/apache/arrow-rs.git", features = ["aws", "http"]}
 
 crossbeam-channel="0.5"
@@ -49,12 +49,12 @@ nanoid = "0.4.0"
 tokio = { version = "1.27.0", features = ["rt"] }
 csv-async = { version = "1.2.6", features = ["tokio"] }
 futures-util = { version = "0.3.27" }
-parquet = {version = "38.0.0", features = ["async"] }
+parquet = {version = "49.0.0", features = ["async"] }
 tokio-util = { version = "0.7.7", features = ["io", "io-util"] }
 futures = {version = "0.3.28"}
-arrow-array = "38.0.0"
-arrow-schema = "38.0.0"
-async-compression = { version = "0.3.15", features = ["gzip", "tokio"] }
+arrow-array = "49.0.0"
+arrow-schema = "49.0.0"
+async-compression = { version = "0.4.5", features = ["gzip", "tokio"] }
 env_logger = "0.10.0"
 
 [dev-dependencies]

src/lib.rs

@@ -443,6 +443,8 @@ pub struct Options {
     #[builder(default)]
     pub low_disk: bool,
     #[builder(default)]
+    pub low_memory: bool,
+    #[builder(default)]
     pub gzip_input: bool,
     #[builder(default)]
     pub json_path_selector: String,
@@ -3232,7 +3234,12 @@ pub fn flatten_single(
     input: String,
     mut flat_files: FlatFiles,
 ) -> Result<FlatFiles> {
-    let (item_sender, item_receiver): (Sender<Item>, Receiver<yajlparser::Item>) = bounded(1000);
+    let channel_size = if flat_files.options.low_memory {
+        flat_files.options.threads + 10
+    } else {
+        1000
+    };
+    let (item_sender, item_receiver): (Sender<Item>, Receiver<yajlparser::Item>) = bounded(channel_size);
 
     let (stop_sender, stop_receiver) = bounded(1);
 
@@ -3426,8 +3433,10 @@ pub fn flatten(input: Box<dyn BufRead>, output: String, mut options: Options) ->
     let mut output_paths = vec![];
     let mut join_handlers = vec![];
 
+    let channel_size = if options.low_memory {options.threads + 10 } else { 1000 };
+
     let (item_sender, item_receiver_initial): (Sender<Item>, Receiver<yajlparser::Item>) =
-        bounded(1000);
+        bounded(channel_size);
 
     let mut stop_senders = vec![];
 
@@ -3932,6 +3941,11 @@ mod tests {
             name.push_str("-low_disk")
         }
 
+        if let Some(low_memory) = options["low_memory"].as_bool() {
+            flatten_options.low_memory = low_memory;
+            name.push_str("-low_memory")
+        }
+
         if let Some(arrays_new_table) = options["arrays_new_table"].as_bool() {
             flatten_options.arrays_new_table = arrays_new_table;
             name.push_str("-arrow_new_table")
@@ -4318,6 +4332,15 @@ mod tests {
         )
     }
 
+    #[test]
+    fn test_low_memory() {
+        test_output(
+            "fixtures/basic.json",
+            vec![],
+            json!({"low_memory": true}),
+        )
+    }
+
     #[test]
     fn test_json_path() {
         test_output(