The optimization replaces the `.format()` method with an f-string for string formatting. This change yields a **14% speedup** by reducing the overhead of method calls and string formatting operations.

**Key Change:**
- `"[organization={}] ".format(organization)` → `f"[organization={organization}] "`

**Why This is Faster:**
F-strings are compiled into more efficient bytecode compared to `.format()` calls. The `.format()` method involves:
1. Method lookup and invocation overhead
2. Dictionary-style argument parsing internally
3. Additional string object creation during formatting

F-strings eliminate these steps by performing the formatting directly at compile time, resulting in fewer Python operations at runtime.

**Performance Impact by Test Case:**
- **String values** (most common case): 41-75% faster - excellent improvement for typical organization IDs
- **Complex objects** (lists, dicts): 10-18% faster - still beneficial but less dramatic due to `__str__()` conversion overhead dominating
- **None values**: Minimal impact (3% faster) since the formatting line isn't executed
- **Large data structures**: 1-3% faster - the string conversion cost dominates, making the formatting optimization less significant

The line profiler shows the formatting line went from 730,025ns to 573,950ns (21% improvement on that specific line), which translates to the overall 14% function speedup. This optimization is particularly effective for applications making frequent calls with typical string organization values.