diff --git a/bench/prng.bench.mo b/bench/prng.bench.mo
new file mode 100644
index 00000000..18f8663e
--- /dev/null
+++ b/bench/prng.bench.mo
@@ -0,0 +1,45 @@
+import Prng "mo:prng";
+
+module {
+  type Schema = {
+    name : Text;
+    description : Text;
+    rows : [Text];
+    cols : [Text];
+  };
+
+  class BenchV1(schema : Schema, run : (Nat, Nat) -> ()) {
+    public func getVersion() : Nat = 1;
+    public func getSchema() : Schema = schema;
+    public let runCell = run;
+  };
+
+  public func init() : BenchV1 {
+    let schema : Schema = {
+      name = "Prng";
+      description = "Benchmark N `next` calls for different PRNGs";
+      rows = ["Seiran128", "SFC64", "SFC32"];
+      cols = ["10", "100", "1000", "10000"];
+    };
+
+    let methods : [{ next : () -> Any }] = [
+      Prng.Seiran128(),
+      Prng.SFC64a(),
+      Prng.SFC32a(),
+    ];
+
+    let ns : [Nat16] = [10, 100, 1000, 10000];
+
+    func run(ri : Nat, ci : Nat) {
+      let n = ns[ci];
+      let next = methods[ri].next;
+      var i : Nat16 = 0;
+      while (i < n) {
+        ignore next();
+        i +%= 1;
+      };
+    };
+
+    BenchV1(schema, run);
+  };
+};
diff --git a/cli/commands/bench/bench-canister.mo b/cli/commands/bench/bench-canister.mo
index 5a7fa6b7..f7348ac7 100644
--- a/cli/commands/bench/bench-canister.mo
+++ b/cli/commands/bench/bench-canister.mo
@@ -2,14 +2,25 @@ import Nat64 "mo:core/Nat64";
 import Nat "mo:core/Nat";
 import Runtime "mo:core/Runtime";
 import InternetComputer "mo:core/InternetComputer";
-import Int64 "mo:core/Int64";
 import Region "mo:core/Region";
 import Prim "mo:prim";
-import Bench "mo:bench";
 
 import UserBench "./user-bench"; // file path will be replaced with the *.bench.mo file path
 
 persistent actor class () {
+  type BenchSchema = {
+    name : Text;
+    description : Text;
+    rows : [Text];
+    cols : [Text];
+  };
+
+  type Bench = {
+    getVersion : () -> Nat;
+    getSchema : () -> BenchSchema;
+    runCell : (Nat, Nat) -> ();
+  };
+
   type BenchResult = {
     instructions : Int;
     rts_mutator_instructions : Int;
@@ -23,16 +34,16 @@ persistent actor class () {
     rts_reclaimed : Int;
   };
 
-  transient var benchOpt : ?Bench.Bench = null;
+  transient var benchOpt : ?Bench = null;
 
-  public func init() : async Bench.BenchSchema {
+  public func init() : async BenchSchema {
     let bench = UserBench.init();
     benchOpt := ?bench;
     ignore Region.grow(Region.new(), 1);
     bench.getSchema();
   };
 
-  public query func getSchema() : async Bench.BenchSchema {
+  public query func getSchema() : async BenchSchema {
     let ?bench = benchOpt else Runtime.trap("bench not initialized");
     bench.getSchema();
   };
@@ -41,7 +52,7 @@ persistent actor class () {
     {
       instructions = 0;
       rts_heap_size = Prim.rts_heap_size();
-      stable_memory_size = Int64.toInt(Int64.fromNat64(Prim.stableMemorySize())) * 65536;
+      stable_memory_size = Prim.rts_stable_memory_size() * 65536;
       rts_stable_memory_size = Prim.rts_stable_memory_size();
       rts_logical_stable_memory_size = Prim.rts_logical_stable_memory_size();
       rts_memory_size = Prim.rts_memory_size();
diff --git a/mops.lock b/mops.lock
index 1294c685..c99eba9d 100644
--- a/mops.lock
+++ b/mops.lock
@@ -1,6 +1,6 @@
 {
   "version": 2,
-  "mopsTomlDepsHash": "722dc0bee276245351407defa34eb1cd2f96334559d4736d892f8871144cfeb1",
+  "mopsTomlDepsHash": "5de8f0a8a095def1d77a4d49f261b1bef9072a7352225e70d7317047d948baff",
   "hashes": {
     "base@0.14.14": {
       "base@0.14.14/NOTICE": "3960a8d25fa5fc909325817b08b36c1146970930ca15b6352f8ea6db803cab47",
@@ -671,6 +671,13 @@
       "bench@1.0.0/LICENSE": "3d081f9b4a5e05c2e02a370bbfac792c81125b4efe1404f79a39359e2b923c63",
       "bench@1.0.0/mops.toml": "f423260f1716f4329713dfbf66343867e749e28646d29a065fac9ecd34e0ba04",
       "bench@1.0.0/src/lib.mo": "1dc6d4709abe393eb7a8496da873028deab9cac11e6c1464ffbde2f2d5151c5b"
+    },
+    "prng@0.0.8": {
+      "prng@0.0.8/NOTICE": "71e037856ba594c2b26f5d97a1f77a907ab2013af8cbb124857ca8b53022f83f",
+      "prng@0.0.8/src/lib.mo": "97d00684d337fcf432d3dd0982e2a427dd54d21b931246a9c2663580e9fc46b2",
+      "prng@0.0.8/README.md": "90b9faa44528ca14916a5d756c187eff26d5ed61e0ca1f22d060fb51a3492a52",
+      "prng@0.0.8/LICENSE": "96c1cc0e3cca2329be9b477518e5c430a4fe51572b3cbcdb8a1036e06ee30855",
+      "prng@0.0.8/mops.toml": "19d90a2cce697c969e042d0b03d42660bf854eae930b627c678a1920ad100126"
     }
   }
-}
\ No newline at end of file
+}
diff --git a/mops.toml b/mops.toml
index b9f5c1cb..dae345e8 100644
--- a/mops.toml
+++ b/mops.toml
@@ -15,6 +15,7 @@ telegram-bot = "0.1.1"
 test = "2.1.1"
 fuzz = "1.0.0"
 bench = "1.0.0"
+prng = "0.0.8"
 
 [toolchain]
 moc = "0.14.14"