009 json vs koru bench

// Benchmark: JSON vs Koru parsing
//
// Compare parsing equivalent data structures.

~import "$std/io"

const std = @import("std");

// Equivalent data as JSON (~same size as Koru sample)
const JSON_SAMPLE =
    \\{
    \\  "events": [
    \\    {"name": "authenticate", "inputs": ["username", "password"], "branches": ["authenticated", "invalid_credentials", "account_locked"]},
    \\    {"name": "validate_token", "inputs": ["token"], "branches": ["valid", "expired", "invalid"]},
    \\    {"name": "refresh_token", "inputs": ["token"], "branches": ["refreshed", "denied"]},
    \\    {"name": "get_user", "inputs": ["user_id"], "branches": ["found", "not_found"]},
    \\    {"name": "check_permission", "inputs": ["user_id", "resource", "action"], "branches": ["allowed", "denied"]},
    \\    {"name": "log_access", "inputs": ["user_id", "resource", "action", "allowed"], "branches": ["logged"]}
    \\  ],
    \\  "flows": [
    \\    {"event": "authenticate", "args": {"username": "admin", "password": "secret"}},
    \\    {"on": "authenticated", "then": {"event": "get_user", "args": {"user_id": "$a.user_id"}}},
    \\    {"on": "found", "then": {"event": "check_permission", "args": {"user_id": "$a.user_id", "resource": "/api/data", "action": "read"}}}
    \\  ]
    \\}
;

~event bench_json {}
| done { items: usize }

~proc bench_json {
    const parsed = std.json.parseFromSlice(std.json.Value, std.heap.page_allocator, JSON_SAMPLE, .{}) catch {
        return .{ .done = .{ .items = 0 } };
    };
    defer parsed.deinit();

    const events = parsed.value.object.get("events") orelse return .{ .done = .{ .items = 0 } };
    return .{ .done = .{ .items = events.array.items.len } };
}

~bench_json()
| done d |> std.io:print.ln("JSON: {{d.items}} events")