Refactor/remove zenoh collections

Cargo.toml

@@ -16,7 +16,6 @@ resolver = "2"
 members = [
     "commons/zenoh-buffers",
     "commons/zenoh-codec",
-    "commons/zenoh-collections",
     "commons/zenoh-config",
     "commons/zenoh-core",
     "commons/zenoh-crypto",
@@ -160,6 +159,7 @@ serde = { version = "1.0.210", default-features = false, features = [
 serde_json = "1.0.128"
 serde_with = "3.12.0"
 serde_yaml = "0.9.34"
+smallvec = "1.13.2"
 static_init = "1.0.3"
 stabby = "36.1.1"
 sha3 = "0.10.8"
@@ -206,7 +206,6 @@ zenoh-util = { version = "1.2.1", path = "commons/zenoh-util" }
 zenoh-crypto = { version = "1.2.1", path = "commons/zenoh-crypto" }
 zenoh-codec = { version = "1.2.1", path = "commons/zenoh-codec" }
 zenoh-sync = { version = "1.2.1", path = "commons/zenoh-sync" }
-zenoh-collections = { version = "1.2.1", path = "commons/zenoh-collections", default-features = false }
 zenoh-macros = { version = "1.2.1", path = "commons/zenoh-macros" }
 zenoh-plugin-trait = { version = "1.2.1", path = "plugins/zenoh-plugin-trait", default-features = false }
 zenoh_backend_traits = { version = "1.2.1", path = "plugins/zenoh-backend-traits", default-features = false }

DEFAULT_CONFIG.json5

@@ -514,12 +514,6 @@
       },
       /// Configure the zenoh RX parameters of a link
       rx: {
-        /// Receiving buffer size in bytes for each link
-        /// The default the rx_buffer_size value is the same as the default batch size: 65535.
-        /// For very high throughput scenarios, the rx_buffer_size can be increased to accommodate
-        /// more in-flight data. This is particularly relevant when dealing with large messages.
-        /// E.g. for 16MiB rx_buffer_size set the value to: 16777216.
-        buffer_size: 65535,
         /// Maximum size of the defragmentation buffer at receiver end.
         /// Fragmented messages that are larger than the configured size will be dropped.
         /// The default value is 1GiB. This would work in most scenarios.

commons/zenoh-buffers/Cargo.toml

@@ -32,4 +32,4 @@ test = ["rand"]
 
 [dependencies]
 rand = { workspace = true, optional = true }
-zenoh-collections = { workspace = true, default-features = false }
+smallvec = { workspace = true }

commons/zenoh-buffers/src/zbuf.rs

@@ -16,7 +16,7 @@ use core::{cmp, iter, num::NonZeroUsize, ptr::NonNull};
 #[cfg(feature = "std")]
 use std::io;
 
-use zenoh_collections::SingleOrVec;
+use smallvec::SmallVec;
 
 use crate::{
     buffer::{Buffer, SplitBuffer},
@@ -30,14 +30,14 @@ use crate::{
 
 #[derive(Debug, Clone, Default, Eq)]
 pub struct ZBuf {
-    slices: SingleOrVec<ZSlice>,
+    slices: SmallVec<[ZSlice; 1]>,
 }
 
 impl ZBuf {
     #[must_use]
-    pub const fn empty() -> Self {
+    pub fn empty() -> Self {
         Self {
-            slices: SingleOrVec::empty(),
+            slices: SmallVec::new(),
         }
     }
 

commons/zenoh-buffers/src/zslice.rs

@@ -168,6 +168,12 @@ impl ZSlice {
         self.len() == 0
     }
 
+    #[doc(hidden)]
+    #[inline]
+    pub fn capacity(&self) -> usize {
+        self.buf.as_slice().len()
+    }
+
     #[inline]
     #[must_use]
     pub fn as_slice(&self) -> &[u8] {