From 63de692f2f1403beca3c51a6bba505a1f5d51ab1 Mon Sep 17 00:00:00 2001
From: Taylan Kammer <taylan.kammer@gmail.com>
Date: Sat, 6 Jun 2026 17:44:55 +0200
Subject: IstrSet: Add new stdlib comparison for benchmarks.

---
 src/zisp/gc/IstrSet.zig | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

(limited to 'src')

diff --git a/src/zisp/gc/IstrSet.zig b/src/zisp/gc/IstrSet.zig
index 4146713..4357608 100644
--- a/src/zisp/gc/IstrSet.zig
+++ b/src/zisp/gc/IstrSet.zig
@@ -34,6 +34,8 @@ buckets: []Bucket = undefined,
 used_buckets: usize = 0,
 used_threshold: usize = undefined,
 
+const test_stdlib_impl = false;
+
 const default_bcount = 512;
 
 pub fn init(alloc: Alloc) !Set {
@@ -41,6 +43,10 @@ pub fn init(alloc: Alloc) !Set {
 }
 
 pub fn initCustom(alloc: Alloc, bcount: usize) !Set {
+    if (test_stdlib_impl) {
+        try map.ensureTotalCapacity(alloc, 512);
+        return Set{ .alloc = alloc };
+    }
     std.debug.assert(@popCount(bcount) == 1); // Must be power of 2.
     var self = Set{ .alloc = alloc };
     try self.allocBuckets(bcount);
@@ -59,6 +65,9 @@ pub fn deinit(self: *Set) void {
 
 /// Get the istr with the given string contents, or alloc and store a new one.
 pub fn getOrNew(self: *Set, s: []const u8) !IstrPtr {
+    if (test_stdlib_impl) {
+        return self.addStdlib(s);
+    }
     std.debug.assert(s.len < 256);
     return self.getOrNewOrPut(s, null);
 }
@@ -131,3 +140,22 @@ fn strEq(s: []const u8, s2: []const u8) bool {
 fn hashFp(hash: u64) u16 {
     return @intCast(hash >> 48);
 }
+
+// Using stdlib, to compare
+
+const str_ctx = std.hash_map.StringContext{};
+
+const Map = std.hash_map.StringHashMapUnmanaged(IstrPtr);
+var map: Map = .empty;
+
+pub fn addStdlib(self: *Set, s: []const u8) !IstrPtr {
+    const gop = map.getOrPutAdapted(self.alloc, s, str_ctx) catch @panic("OOM");
+    if (gop.found_existing) {
+        return gop.value_ptr.*;
+    }
+
+    const istr = try self.newIstr(s);
+    gop.key_ptr.* = istr.str();
+    gop.value_ptr.* = istr;
+    return istr;
+}
-- 
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