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perf: speed up G-code export by up to 8% via cheaper G-code text building (#16108)

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This commit is contained in:
Kris Austin
2026-10-03 20:29:54 -03:00
committed by GitHub
parent 32b1e69fdd
commit 5be5c90e59
13 changed files with 365 additions and 84 deletions
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src/libslic3r/GCodeWriter.cpp
+68 -26
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@@ -9,6 +9,7 @@
#include "ClipperUtils.hpp"
#include "Geometry/ArcWelder.hpp"
#include "Line.hpp"
#include "LocalesUtils.hpp"
#include "libslic3r.h"
#include <algorithm>
#include <cmath>
@@ -380,26 +381,35 @@ std::string GCodeWriter::set_acceleration_internal(Acceleration type, unsigned i
last_value = acceleration;
std::ostringstream gcode;
if (FLAVOR_IS(gcfRepetier))
gcode << (separate_travel ? "M202 X" : "M201 X") << acceleration << " Y" << acceleration;
else if (FLAVOR_IS(gcfRepRapFirmware) || FLAVOR_IS(gcfMarlinFirmware))
gcode << (separate_travel ? "M204 T" : "M204 P") << acceleration;
else if (FLAVOR_IS(gcfKlipper)) {
gcode << "SET_VELOCITY_LIMIT ACCEL=" << acceleration;
const std::string value = std::to_string(acceleration);
std::string gcode;
if (FLAVOR_IS(gcfRepetier)) {
gcode += separate_travel ? "M202 X" : "M201 X";
gcode += value;
gcode += " Y";
gcode += value;
} else if (FLAVOR_IS(gcfRepRapFirmware) || FLAVOR_IS(gcfMarlinFirmware)) {
gcode += separate_travel ? "M204 T" : "M204 P";
gcode += value;
} else if (FLAVOR_IS(gcfKlipper)) {
gcode.reserve(96);
gcode += "SET_VELOCITY_LIMIT ACCEL=";
gcode += value;
if (this->config.accel_to_decel_enable) {
gcode << " ACCEL_TO_DECEL=" << acceleration * this->config.accel_to_decel_factor / 100;
gcode += " ACCEL_TO_DECEL=";
gcode += float_to_string_decimal_point(acceleration * this->config.accel_to_decel_factor / 100);
if (GCodeWriter::full_gcode_comment)
gcode << " ; adjust ACCEL_TO_DECEL";
gcode += " ; adjust ACCEL_TO_DECEL";
}
} else {
gcode += "M204 S";
gcode += value;
}
else
gcode << "M204 S" << acceleration;
if (GCodeWriter::full_gcode_comment) gcode << " ; adjust acceleration";
gcode << "\n";
if (GCodeWriter::full_gcode_comment) gcode += " ; adjust acceleration";
gcode += "\n";
return gcode.str();
return gcode;
}
std::string GCodeWriter::set_jerk_xy(double jerk)
@@ -476,25 +486,29 @@ std::string GCodeWriter::set_accel_and_jerk(unsigned int acceleration, double je
if (!set_acceleration && !set_jerk)
return std::string();
std::ostringstream gcode;
gcode << "SET_VELOCITY_LIMIT";
std::string gcode;
gcode.reserve(96);
gcode += "SET_VELOCITY_LIMIT";
if (set_acceleration) {
gcode << " ACCEL=" << acceleration;
gcode += " ACCEL=";
gcode += std::to_string(acceleration);
if (this->config.accel_to_decel_enable) {
gcode << " ACCEL_TO_DECEL=" << acceleration * this->config.accel_to_decel_factor / 100;
gcode += " ACCEL_TO_DECEL=";
gcode += float_to_string_decimal_point(acceleration * this->config.accel_to_decel_factor / 100);
}
m_last_acceleration = acceleration;
}
if (set_jerk) {
gcode << " SQUARE_CORNER_VELOCITY=" << jerk;
gcode += " SQUARE_CORNER_VELOCITY=";
gcode += float_to_string_decimal_point(jerk);
m_last_jerk = jerk;
}
if (GCodeWriter::full_gcode_comment)
gcode << " ; adjust VELOCITY_LIMIT(accel/jerk)";
gcode << "\n";
gcode += " ; adjust VELOCITY_LIMIT(accel/jerk)";
gcode += "\n";
return gcode.str();
return gcode;
}
@@ -753,6 +767,13 @@ double GCodeWriter::get_extruder_retracted_length(const int filament_id)
}
std::string GCodeWriter::set_speed(double F, const std::string &comment, const std::string &cooling_marker)
{
std::string gcode;
this->set_speed(gcode, F, comment, cooling_marker);
return gcode;
}
void GCodeWriter::set_speed(std::string &out, double F, const std::string &comment, const std::string &cooling_marker)
{
assert(F > 0.);
assert(F < 100000.);
@@ -763,7 +784,7 @@ std::string GCodeWriter::set_speed(double F, const std::string &comment, const s
//BBS
w.emit_comment(GCodeWriter::full_gcode_comment, comment);
w.emit_string(cooling_marker);
return w.string();
w.append_to(out);
}
std::string GCodeWriter::travel_to_xy(const Vec2d &point, const std::string &comment)
@@ -1115,6 +1136,13 @@ bool GCodeWriter::will_move_z(double z) const
}
std::string GCodeWriter::extrude_to_xy(const Vec2d &point, double dE, const std::string &comment, bool force_no_extrusion)
{
std::string gcode;
this->extrude_to_xy(gcode, point, dE, comment, force_no_extrusion);
return gcode;
}
void GCodeWriter::extrude_to_xy(std::string &out, const Vec2d &point, double dE, const std::string &comment, bool force_no_extrusion)
{
m_pos(0) = point(0);
m_pos(1) = point(1);
@@ -1133,13 +1161,20 @@ std::string GCodeWriter::extrude_to_xy(const Vec2d &point, double dE, const std:
w.emit_e(filament()->E());
//BBS
w.emit_comment(GCodeWriter::full_gcode_comment, comment);
return w.string();
w.append_to(out);
}
//BBS: generate G2 or G3 extrude which moves by arc
//point is end point which means X and Y axis
//center_offset is I and J axis
std::string GCodeWriter::extrude_arc_to_xy(const Vec2d& point, const Vec2d& center_offset, double dE, const bool is_ccw, const std::string& comment, bool force_no_extrusion)
{
std::string gcode;
this->extrude_arc_to_xy(gcode, point, center_offset, dE, is_ccw, comment, force_no_extrusion);
return gcode;
}
void GCodeWriter::extrude_arc_to_xy(std::string &out, const Vec2d& point, const Vec2d& center_offset, double dE, const bool is_ccw, const std::string& comment, bool force_no_extrusion)
{
m_pos(0) = point(0);
m_pos(1) = point(1);
@@ -1155,10 +1190,17 @@ std::string GCodeWriter::extrude_arc_to_xy(const Vec2d& point, const Vec2d& cent
w.emit_e(filament()->E());
//BBS
w.emit_comment(GCodeWriter::full_gcode_comment, comment);
return w.string();
w.append_to(out);
}
std::string GCodeWriter::extrude_to_xyz(const Vec3d &point, double dE, const std::string &comment, bool force_no_extrusion)
{
std::string gcode;
this->extrude_to_xyz(gcode, point, dE, comment, force_no_extrusion);
return gcode;
}
void GCodeWriter::extrude_to_xyz(std::string &out, const Vec3d &point, double dE, const std::string &comment, bool force_no_extrusion)
{
// Check if Z actually changes (at export precision) before emitting it.
// ZAA sloped extrusions call this for every segment, but many consecutive
@@ -1182,7 +1224,7 @@ std::string GCodeWriter::extrude_to_xyz(const Vec3d &point, double dE, const std
w.emit_e(filament()->E());
//BBS
w.emit_comment(GCodeWriter::full_gcode_comment, comment);
return w.string();
w.append_to(out);
}
std::string GCodeWriter::retract(bool before_wipe, double retract_length)