add snmalloc

Author: marvin-j97

Cargo.toml

@@ -7,7 +7,7 @@ edition = "2021"
 debug = false
 
 [features]
-default = ["jemalloc"]
+default = []
 heed = ["dep:heed"]
 jemalloc = ["dep:jemallocator"]
 mimalloc = ["dep:mimalloc"]
@@ -16,6 +16,7 @@ sqlite = ["dep:rusqlite"]
 tcmalloc = ["dep:tcmalloc"]
 antithesis = ["dep:precept"]
 metrics = ["fjall_3/metrics"]
+snmalloc = ["dep:snmalloc"]
 
 [target.'cfg(not(target_env = "msvc"))'.dependencies]
 jemallocator = { version = "0.5.4", optional = true }
@@ -54,3 +55,4 @@ r2d2 = "0.8.10"
 r2d2_sqlite = "0.31.0"
 format-bytes = "0.3.0"
 pretty-bytes = "0.2.2"
+snmalloc = { package = "snmalloc-rs", version = "0.1.0", optional = true }

src/db/mod.rs

@@ -910,6 +910,7 @@ impl DatabaseWrapper {
             #[cfg(feature = "metrics")]
             GenericDatabase::Fjall3 { tree, .. } => tree.inner().metrics().block_cache_hit_rate(),
 
+            #[cfg(feature = "rocksdb")]
             #[cfg(feature = "metrics")]
             GenericDatabase::RocksDb { tickers, opts, .. } => {
                 let cache_hits = opts.get_ticker_count(tickers.block_cached) as f64;
@@ -925,6 +926,7 @@ impl DatabaseWrapper {
     /// % of filter queries that successfully filtered out superfluous I/O.
     pub fn filter_true_negative_ratio(&self) -> f64 {
         match &self.inner {
+            #[cfg(feature = "metrics")]
             GenericDatabase::Fjall3 { tree, .. } => tree.inner().metrics().filter_efficiency(),
 
             _ => 0.0,

src/main.rs

@@ -30,6 +30,10 @@ static GLOBAL: mimalloc::MiMalloc = mimalloc::MiMalloc;
 #[global_allocator]
 static GLOBAL: tcmalloc::TCMalloc = tcmalloc::TCMalloc;
 
+#[cfg(feature = "snmalloc")]
+#[global_allocator]
+static ALLOC: snmalloc::SnMalloc = snmalloc::SnMalloc;
+
 /// Gets the unix timestamp as a duration
 pub fn unix_timestamp() -> std::time::Duration {
     let now = std::time::SystemTime::now();