The sizes are known at Python codegen time, so use FixedVector with
init() for a single allocation and no reallocation machinery. This
eliminates _M_realloc_append template instantiations for these types.
The sizes are known at Python codegen time, so use FixedVector with
init() for a single allocation and no reallocation machinery. This
eliminates _M_realloc_append template instantiations for these types.
request_headers_ and json_ are populated at config time via
add_request_header()/add_json() and only iterated linearly at
runtime. std::map's red-black tree is unnecessary overhead for
these small collections. Drop the <map> include.
The template only existed to share a loop between set and vector
iterators. Instead, have the deprecated set overload forward to
the vector overload, and inline the loop there.
start() already lowercases all collect_headers via lowercase_headers(),
so pre-lowercasing at insertion time was redundant double work on
every request.
Both start() overloads now use a shared lowercase_headers() template
that does a single pass from any iterator range, avoiding the extra
vector copy that the set overload was doing.
The vector overload of start() was passing collect_headers directly
to perform() without lowercasing. This meant callers using get()/post()
with mixed-case header names (e.g. {"ETag"}) would fail to match
against the lowercased header names from the HTTP response.
The no-collect-headers start() overload calls perform() directly
instead of the vector start() overload to avoid ambiguity with
the deprecated std::set overload.
- Change get()/post() collect_headers param from std::set to std::vector
(initializer list callers like online_image work unchanged)
- Add ESPDEPRECATED on start() std::set overload with clear message
about the collect_headers parameter
Replace heavy STL containers with simple std::vector and linear scan
for response header collection. This eliminates red-black tree (_Rb_tree)
and hash table template instantiations that are unnecessary for the small
number of headers typically collected (1-5 elements).
Changes:
- response_headers_: std::map<string, list<string>> -> std::vector<Header>
- collect_headers_: std::set<string> -> std::vector<string>
- perform() signature: std::set -> std::vector
- Add should_collect_header() inline helper for linear scan
- Lowercase collect_headers at config/insertion time instead of per-request
- IDF UserData now holds references to container's vector instead of
owning a separate map that gets moved after the request
- Reuse existing Header struct instead of std::pair
Reduces stack usage in perform() and eliminates STL container overhead
on memory-constrained ESP devices.
Pass ProtoWriteBuffer by reference instead of by value in virtual
encode() methods. This avoids copying both buffer_ and pos_ pointers
for every encode call - only a single pointer is passed.
Also simplifies encode_message since child writes directly advance
the shared pos_. Adds debug_check_size_ to verify calculate_size
matches actual encode output.
ProtoSize::calculate_size() already computes the exact encoded size
before encode() runs and is the boundary validation. The buffer is
pre-sized to match. Since the buffer size is always correct,
push_back() capacity checks on every byte are redundant overhead.
Rename ProtoWriteBuffer to ProtoWritePreSizedBuffer to document the
contract. Write through a raw uint8_t* pointer instead of push_back().
Pre-resize the buffer to include payload space before encoding.
Add ESPHOME_DEBUG_API bounds checks to validate writes stay within the
pre-sized region during development and integration testing.
ProtoSize::calculate_size() already computes the exact encoded size
before encode() runs and is the boundary validation. The buffer is
pre-sized to match. Since the buffer size is always correct,
push_back() capacity checks on every byte are redundant overhead.
Rename ProtoWriteBuffer to ProtoWritePreSizedBuffer to document the
contract. Write through a raw uint8_t* pointer instead of push_back().
Pre-resize the buffer to include payload space before encoding.
Add ESPHOME_DEBUG_API bounds checks to validate writes stay within the
pre-sized region during development and integration testing.
ProtoSize::calculate_size() already computes the exact encoded size
before encode() runs and is the boundary validation. The buffer is
pre-sized to match. Since the buffer size is always correct,
push_back() capacity checks on every byte are redundant overhead.
Rename ProtoWriteBuffer to ProtoWritePreSizedBuffer to document the
contract. Write through a raw uint8_t* pointer instead of push_back().
Pre-resize the buffer to include payload space before encoding.
Add ESPHOME_DEBUG_API bounds checks to validate writes stay within the
pre-sized region during development and integration testing.
All send paths already call prepare_first_message_buffer which does
clear() + reserve() with the exact needed size, making the initial
reserve(64) redundant. Removing it saves 68 bytes of flash.
