From 493e6aec3169c3ec3b9beffbb836e54e07e69d40 Mon Sep 17 00:00:00 2001
From: Andrew Noyes <andrew@weaselab.dev>
Date: Thu, 22 May 2025 19:24:14 -0400
Subject: [PATCH] Benchmark different strides

---
 src/test.cpp | 26 ++++++++++++++++++--------
 1 file changed, 18 insertions(+), 8 deletions(-)

diff --git a/src/test.cpp b/src/test.cpp
index 9a5b389..a56a29d 100644
--- a/src/test.cpp
+++ b/src/test.cpp
@@ -266,12 +266,22 @@ TEST_CASE("bench3") {
   ankerl::nanobench::Bench bench;
   bench.batch(json.size());
   bench.unit("byte");
-  bench.run("parser3", [&]() {
-    auto copy = json;
-    parser3::Parser3 parser(&c, nullptr);
-    bench.doNotOptimizeAway(parser.parse(copy.data(), copy.length()));
-    bench.doNotOptimizeAway(parser.parse(nullptr, 0) == WeaselJson_OK);
-  });
+  for (int stride = 1; stride <= json.size(); stride *= 2) {
+    bench.run("parser3 (stride: " + std::to_string(stride) + ")", [&]() {
+      auto copy = json;
+      parser3::Parser3 parser(&c, nullptr);
+      for (int i = 0; i < copy.size(); i += stride) {
+        if (parser.parse(copy.data() + i,
+                         std::min<int>(copy.size() - i, stride)) !=
+            WeaselJson_AGAIN) {
+          abort();
+        }
+      }
+      if (parser.parse(nullptr, 0) != WeaselJson_OK) {
+        abort();
+      }
+    });
+  }
 }
 
 TEST_CASE("bench4") {
@@ -279,7 +289,7 @@ TEST_CASE("bench4") {
   ankerl::nanobench::Bench bench;
   bench.batch(json.size());
   bench.unit("byte");
-  bench.run("parser4", [&]() {
+  bench.run("simdjson dom", [&]() {
     simdjson::padded_string my_padded_data(json.data(), json.size());
     simdjson::dom::parser parser;
     auto doc = parser.parse(my_padded_data);
@@ -292,7 +302,7 @@ TEST_CASE("bench5") {
   ankerl::nanobench::Bench bench;
   bench.batch(json.size());
   bench.unit("byte");
-  bench.run("parser5", [&]() {
+  bench.run("simdjson on demand", [&]() {
     padded_string my_padded_data(json.data(), json.size());
     ondemand::parser parser;
     auto doc = parser.iterate(my_padded_data);